CN212673991U - House squareness measuring device with high measuring precision - Google Patents
House squareness measuring device with high measuring precision Download PDFInfo
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- CN212673991U CN212673991U CN202021799014.1U CN202021799014U CN212673991U CN 212673991 U CN212673991 U CN 212673991U CN 202021799014 U CN202021799014 U CN 202021799014U CN 212673991 U CN212673991 U CN 212673991U
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Abstract
The application relates to the field of house detection devices, in particular to a house squaring measurement device with high measurement precision. The house squareness measuring device with higher measuring precision comprises a first mounting rod, a second mounting rod, a first driving mechanism and a second driving mechanism, wherein a first mounting cavity with first measuring ports at two ends is arranged on the first mounting rod; the second mounting rod is provided with a second mounting cavity with second measuring ports at two ends, and a second measuring rod which can respectively stretch relative to the two second measuring ports is arranged in the second mounting cavity; scales are arranged on the first measuring rod and the second measuring rod; the first driving mechanism is used for driving the two first measuring rods to synchronously extend and retract, and the second driving mechanism is used for driving the two second measuring rods to synchronously extend and retract. This application has the effect that improves measurement accuracy.
Description
Technical Field
The application relates to the field of house detection devices, in particular to a house squaring measurement device with high measurement precision.
Background
At present, with the acceleration of urban construction in China, real estate becomes an important component of domestic data and production data in China, and investment construction of real estate also becomes the most important investment force of fixed assets in China at present, however, property damage phenomena occurring in the real estate are frequent, various real estate evaluations with damaged values are easily encountered, and in the house construction, the house squareness measurement is carried out to ensure that a house has high squareness.
When the squareness measurement is carried out in current house, whether four inside corners of house that awaits measuring are the right angle directly to utilize the square to measure usually, and then judge whether the house that awaits measuring is squarely, and this kind of measuring mode can only measure whether the corner is the right angle, consequently can lead to appearing the corner and be the result that the corner is the right angle and the house is still not squareness, so measurement accuracy is not high enough.
With respect to the related art in the above, the inventors consider that there is a defect that the measurement accuracy is not high.
Disclosure of Invention
In order to improve measurement accuracy, the application provides the house side of measurement accuracy height and just measuring device.
The application provides a house side of higher measurement accuracy is just measuring device adopts following technical scheme:
a house squareness measuring device with high measuring precision comprises first mounting rods, second mounting rods, first measuring rods, second measuring rods, a first driving mechanism and a second driving mechanism, wherein a first mounting cavity is formed in each first mounting rod, first measuring ports communicated with the first mounting cavities are formed in two ends of each first mounting cavity, the number of the first measuring rods is two, the two first measuring rods are arranged in the first mounting cavities, one first measuring rod can stretch relative to one first measuring port, and the other first measuring rod can stretch relative to the other first measuring port; the first mounting rod and the second mounting rod are the same in length, and the center point of the second mounting rod is rotatably connected with the center point of the first mounting rod; the second mounting rod is provided with a second mounting cavity, two ends of the second mounting cavity are respectively provided with a second measuring port communicated with the second mounting cavity, the number of the second measuring rods is two, the two second measuring rods are arranged in the second mounting cavity, one second measuring rod can stretch relative to one second measuring port, and the other second measuring rod can stretch relative to the other second measuring port; scales are arranged on the first measuring rod and the second measuring rod; the first driving mechanism is used for driving the two first measuring rods to synchronously extend and retract, and the second driving mechanism is used for driving the two second measuring rods to synchronously extend and retract.
By adopting the technical scheme, the first driving mechanism is adopted to drive the two first measuring rods to respectively extend out from different first measuring ports during measurement until the two first measuring rods are respectively abutted against two opposite wall corners, then the second driving mechanism is adopted to drive the two second measuring rods to respectively extend out from different second measuring ports, if the end parts of the two second measuring rods cannot simultaneously point to the other opposite wall corners, the house is not correct, if the end parts of the two second measuring rods can be simultaneously abutted against the other two wall corners, the numerical value at the first measuring port on the first measuring rod is read, the numerical value is the length of the first measuring rod extending out of the first measuring port, then the numerical value at the second measuring port on the second measuring rod is read, the length of the second measuring rod extending out of the second measuring port is read, if the numerical values are equal, the house is correct, otherwise, the house is not correct. Therefore, the house squareness measuring device with higher measuring precision can accurately measure whether a house is square or not, and the measuring precision is improved.
Preferably, the first drive mechanism is disposed within the first mounting cavity.
Through adopting above-mentioned technical scheme, first actuating mechanism is difficult for suffering the collision impaired, long service life.
Preferably, the first driving mechanism comprises a bidirectional screw, a first moving sleeve and a second moving sleeve, and the bidirectional screw is rotatably arranged in the first mounting cavity; the length direction of the bidirectional screw is the same as that of the first mounting rod; the bidirectional screw is provided with a first screw section and a second screw section with opposite threads, the first movable sleeve is sleeved on the first screw section in a threaded manner, and the second movable sleeve is sleeved on the second screw section in a threaded manner; the first movable sleeve is fixedly connected with one first measuring rod, and the second movable sleeve is fixedly connected with the other first measuring rod; the cavity wall of the first installation cavity is provided with a limiting part, and the limiting part is used for limiting the first moving sleeve and the second moving sleeve so that the first moving sleeve and the second moving sleeve are driven to move along the length direction of the bidirectional screw rod.
By adopting the technical scheme, when the bidirectional screw rod rotates, the first movable sleeve and the second movable sleeve are limited by the limiting part, so that the first movable sleeve and the second movable sleeve cannot rotate along with the bidirectional screw rod when the bidirectional screw rod rotates, and can move along the length direction of the bidirectional screw rod. The first movable sleeve and the second movable sleeve are respectively sleeved on the first screw section and the second screw section of the bidirectional screw rod, wherein the screw threads of the bidirectional screw rod are opposite, so that the first movable sleeve and the second movable sleeve can move in opposite directions when the bidirectional screw rod rotates, and therefore the two first measuring rods can stretch relative to the corresponding first measuring ports at the same time when the bidirectional screw rod rotates.
Preferably, the limiting part is a limiting groove, and the length direction of the limiting groove is consistent with the length direction of the bidirectional screw; the limiting groove is formed in the wall of the first installation cavity, a first limiting block is arranged on the first movable sleeve, a second limiting block is arranged on the second movable sleeve, and the first limiting block and the second limiting block are inserted into the limiting groove.
Through adopting above-mentioned technical scheme, because first stopper and second stopper insert the spacing groove, first stopper and second stopper can only slide in the spacing groove along the length direction of spacing groove, so first removal cover and second remove the cover and also can only remove along the length direction of spacing groove two-way screw promptly, so first removal cover and second remove the cover and can not follow two-way screw and rotate when two-way screw rotates, can follow the length direction motion of two-way screw.
Preferably, this house side of higher measurement accuracy is just measuring device still includes reversing mechanism, reversing mechanism includes first terminal surface gear, second terminal surface gear and reversing bar, the fixed cover of first terminal surface gear is established on the two-way screw rod, the second terminal surface gear with first terminal surface gear engagement, the fixed cover of second terminal surface gear is established on the reversing bar, the length axis direction of reversing bar with the length axial direction of two-way screw rod is perpendicular.
Through adopting above-mentioned technical scheme, the rotation that the second terminal surface gear also can be corresponding when rotating the reversing lever, thereby also can corresponding rotation with the first terminal surface gear of second terminal surface gear engagement, because the fixed cover of first terminal surface gear is established on two-way screw rod, thereby two-way screw rod also can rotate thereupon, because the length axis direction of reversing lever is perpendicular with the length axial direction of two-way screw rod, so the reversing lever can order about two-way screw rod at the position of being convenient for operate and rotate, the event measurer uses this house square measuring device that measurement accuracy is higher comparatively convenient, measurer's use sense is better.
Preferably, this positive measuring device in house that measurement accuracy is higher still includes rotates the handle, first face gear and second face gear all are located in first installation cavity, the first installation cavity is worn out to the tip that the reversing bar deviates from the second face gear, it establishes to rotate the fixed cover of handle the tip that the second installation cavity is worn out to the reversing bar.
Through adopting above-mentioned technical scheme, because first face gear and second face gear set up inside first installation cavity, so first face gear and second face gear are difficult for colliding impaired, and life is longer. Meanwhile, the force application area of a measurer is increased by rotating the handle, and the use feeling of the measurer is better.
Preferably, a first rotating part is arranged at the central point of the first mounting rod, and a clamping block is arranged on the first rotating part; the center point of the second mounting rod is provided with a second rotating part, and a plurality of clamping grooves for the clamping blocks to be inserted are formed in the second rotating part at intervals along the circumferential direction.
Through adopting above-mentioned technical scheme, only need to make the fixture block insert the draw-in groove of different positions, the relative angle of first installation pole and second installation pole has just realized changing, and relative rotation has been realized to first installation pole and second installation pole promptly. Because two diagonal relative angles of the houses with different areas are different, the angle of the first installation rod and the second installation rod can be adjusted to match the measurement requirements of the houses with different areas, and the house squareness measurement device with higher measurement precision has stronger universality.
Preferably, the second driving mechanism is identical in structure to the first driving mechanism.
Through adopting above-mentioned technical scheme, two second measuring sticks of drive that second actuating mechanism can be convenient are flexible for corresponding second measurement mouth simultaneously.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the house squareness measuring device with higher measuring precision can accurately measure whether a house is square or not, and the measuring precision is improved;
2. the use feeling of a measurer is better;
3. the house squareness measuring device with higher measuring precision has stronger universality.
Drawings
Fig. 1 is a schematic structural diagram of a house squareness measurement device with high measurement accuracy according to an embodiment of the present application.
Fig. 2 is a sectional view of the high-accuracy square measuring apparatus of the house of fig. 1 to highlight the internal structure of the first installation pole.
Description of reference numerals: 1. a first mounting bar; 2. a second mounting bar; 3. a first measuring rod; 4. a second measuring rod; 5. a first drive mechanism; 51. a bidirectional screw; 511. a first helical segment; 512. a second helical segment; 52. a first moving sleeve; 53. a second movable sleeve; 6. a reversing mechanism; 61. a first face gear; 62. a second face gear; 63. a reversing lever; 7. a first mounting cavity; 8. a first measurement port; 9. a second mounting cavity; 10. a second measurement port; 11. calibration; 12. a limiting groove; 13. a first stopper; 14. a second limiting block; 15. rotating the handle; 16. a first rotating section; 17. a second rotating part; 18. a clamping block; 19. a clamping groove.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses house side and side measuring device that measurement accuracy is higher. Referring to fig. 1, the house square and square measuring device with high measurement accuracy comprises a first installation rod 1, a second installation rod 2, a first measuring rod 3 and a second measuring rod 4, wherein the first installation rod 1 and the second installation rod 2 are square rods and are the same in length, the central point of the first installation rod 1 is connected with the central point of the second installation rod 2, a first installation cavity 7 is arranged on the first installation rod 1, first measuring ports 8 communicated with the first installation cavity 7 are arranged at two ends of the first installation cavity 7, the first measuring rod 3 can be a square rod, the number of the first measuring rods 3 is two, the two first measuring rods 3 are arranged in the first installation cavity 7, one first measuring rod 3 can stretch relative to one first measuring port 8, and the other first measuring rod 3 can stretch relative to the other first measuring port 8. Be equipped with second installation cavity 9 on the second installation pole 2, the both ends of second installation cavity 9 all are equipped with the second measuring port 10 of intercommunication second installation cavity 9, and the quantity of second measuring stick 4 is two, and two second measuring sticks 4 all set up in second installation cavity 9, and a second measuring stick 4 can be flexible for a second measuring port 10, and another second measuring stick 4 can be flexible for another second measuring port 10. All be equipped with scale 11 on first measuring stick 3 and the second measuring stick 4, scale 11 on the first measuring stick 3 and the scale 11 on the second measuring stick 4 can all be towards the upper end, and the upper end of here indicates the one end that deviates from the roofing when using house squareness measuring device to measure house squareness.
During measurement, the two first measuring rods 3 extend out from different first measuring ports 8 respectively until the two first measuring rods 3 abut against two opposite wall corners respectively, then the two second measuring rods 4 are driven to extend out from different second measuring ports 10 respectively, if the end parts of the two second measuring rods 4 cannot point to the other opposite wall corners simultaneously, the house is not correct, if the end parts of the two second measuring rods 4 can abut against the other two wall corners simultaneously, the numerical value of the first measuring port 8 on the first measuring rod 3 is read, namely the length of the first measuring rod 3 extending out of the first measuring port 8, and then the numerical value of the second measuring port 10 on the second measuring rod 4 is read, namely the length of the second measuring rod 4 extending out of the second measuring port 10, if the numerical values are equal, the house is correct, otherwise, the house is not correct. Therefore, the house squareness measuring device with higher measuring precision can accurately measure whether a house is square or not, and the measuring precision is improved.
Further, referring to fig. 2, the house squareness measuring device with high measurement accuracy includes a first driving mechanism 5 and a second driving mechanism (not shown in the figure), the first driving mechanism 5 and the second driving mechanism are identical in structure, the first driving mechanism 5 is disposed in the first installation cavity 7, and similarly, the second driving mechanism is disposed in the second installation cavity 9. The first driving mechanism 5 is used for driving the two first measuring rods 3 to synchronously extend and retract, the second driving mechanism is used for driving the two second measuring rods 4 to synchronously extend and retract, and the connection mode of the first driving mechanism 5 and the first measuring rod 3 is the same as the connection mode of the second driving mechanism and the second measuring rod 4. The specific configurations of the first drive mechanism 5 and the second drive mechanism will be described below by taking the first drive mechanism 5 as an example.
Referring to fig. 2, the first driving mechanism 5 includes a bidirectional screw 51, a first moving sleeve 52 and a second moving sleeve 53, the bidirectional screw 51 is rotatably disposed in the first mounting cavity 7; the longitudinal direction of the bidirectional screw 51 is the same as the longitudinal direction of the first mounting rod 1. The bidirectional screw 51 is provided with a first screw section 511 and a second screw section 512 with opposite threads, the first movable sleeve 52 is sleeved on the first screw section 511 in a threaded manner, and the second movable sleeve 53 is sleeved on the second screw section 512 in a threaded manner; the first moving sleeve 52 is fixedly connected with one first measuring rod 3 by welding or integral molding, and the second moving sleeve 53 is fixedly connected with the other first measuring rod 3 by welding or integral molding. The wall of the first installation cavity 7 is provided with a limiting part which is a limiting groove 12, and the length direction of the limiting groove 12 is consistent with the length direction of the bidirectional screw 51; the limiting groove 12 is arranged on the wall of the first installation cavity 7, the first limiting block 13 is fixedly arranged on the side portion of the first moving sleeve 52, the first limiting block 13 can be square, the second limiting block 14 is fixedly arranged on the side portion of the second moving sleeve 53, the second limiting block 14 can be square, the limiting groove 12 is correspondingly a square groove, and the first limiting block 13 and the second limiting block 14 are inserted into the limiting groove 12. When the bidirectional screw 51 rotates, because the first stopper 13 and the second stopper 14 are inserted into the stopper groove 12, and the first stopper 13 and the second stopper 14 can only slide in the stopper groove 12 along the length direction of the stopper groove 12, the first movable sleeve 52 and the second movable sleeve 53 can only move along the length direction of the stopper groove 12, i.e., the bidirectional screw 51, and the first movable sleeve 52 and the second movable sleeve 53 are respectively sleeved on the first screw segment 511 and the second screw segment 512 of the bidirectional screw 51 with opposite threads, so that the first movable sleeve 52 and the second movable sleeve 53 can move along opposite directions when the bidirectional screw 51 rotates, and thus the two first measuring rods 3 can simultaneously extend and retract relative to the corresponding first measuring ports 8 when the bidirectional screw 51 rotates.
Further, referring to fig. 2, the house square and square measuring device with high measurement accuracy further comprises a reversing mechanism 6, the reversing mechanism 6 comprises a first face gear 61, a second face gear 62 and a reversing rod 63, the first face gear 61 is fixedly sleeved on a bidirectional screw 51 in the first installation cavity 7, the fixed sleeving mode can be a key connection mode, the second face gear 62 is arranged inside the first installation cavity 7 and meshed with the first face gear 61, the second face gear 62 is fixedly sleeved on the reversing rod 63, the length axis direction of the reversing rod 63 is perpendicular to the length axial direction of the bidirectional screw 51, the end of the reversing rod 63 penetrates out of the first installation cavity 7, meanwhile, the end of the reversing rod 63 penetrating out of the first installation cavity 7 is provided with a rotating handle 15, and the rotating handle 15 can be a circular handle. The reversing rod 63 can correspondingly rotate when the handle 15 is rotated, the second end face gear 62 can correspondingly rotate when the reversing rod 63 rotates, so that the first end face gear 61 meshed with the second end face gear 62 can correspondingly rotate, the first end face gear 61 is fixedly sleeved on the bidirectional screw 51, the bidirectional screw 51 can also rotate along with the bidirectional screw, and the reversing rod 63 can drive the bidirectional screw 51 to rotate at a position convenient to operate because the length axis direction of the reversing rod 63 is vertical to the length axial direction of the bidirectional screw 51, so that a measurer can conveniently use the house squareness measuring device with higher measuring precision, and the use feeling of the measurer is better.
Finally, referring to fig. 1, regarding a specific connection manner of the first mounting rod 1 and the second mounting rod 2, a first rotating portion 16 is provided at a central point of the first mounting rod 1, the first rotating portion 16 may be cylindrical, a latch 18 is provided on the first rotating portion 16, and the latch 18 may be a square block. The second rotating portion 17 is disposed at a central point of the second mounting rod 2, the second rotating portion 17 may also be cylindrical, the second rotating portion 17 is circumferentially provided with a plurality of slots 19 for inserting the locking blocks 18 at intervals, and the slots 19 are correspondingly square slots. Only by inserting the fixture block 18 into the fixture grooves 19 at different positions, the relative angle between the first mounting rod 1 and the second mounting rod 2 is changed, that is, the first mounting rod 1 and the second mounting rod 2 are rotated relatively. Because two diagonal relative angles of the houses with different areas are different, the angle of the first installation rod 1 and the angle of the second installation rod 2 can be adjusted to match the measurement requirements of the houses with different areas, and the house square measuring device with higher measurement precision has stronger universality.
The implementation principle of the house squaring measuring device with higher measuring accuracy in the embodiment of the application is as follows: during measurement, the two first measuring rods 3 respectively extend out from different first measuring ports 8 until the two first measuring rods 3 are respectively abutted against two opposite wall corners, then the two second measuring rods 4 are driven to respectively extend out from different second measuring ports 10, if the end parts of the two second measuring rods 4 cannot point to the other opposite wall corners at the same time, the house is not correct, if the end parts of the two second measuring rods 4 can be abutted against the other two wall corners at the same time, the numerical value of the first measuring port 8 on the first measuring rod 3 is read, the numerical value is the length of the first measuring rod 3 extending out of the first measuring port 8, then the numerical value of the second measuring port 10 on the second measuring rod 4 is read, the length of the second measuring rod 4 extending out of the second measuring port 10 is read, if the numerical values are equal, the house is correct, and otherwise, the house is not correct. Therefore, the house squareness measuring device with higher measuring precision can accurately measure whether a house is square or not, and the measuring precision is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a house side of measurement accuracy is higher is just measuring device which characterized in that: the measuring device comprises first mounting rods (1), second mounting rods (2), first measuring rods (3), second measuring rods (4), a first driving mechanism (5) and a second driving mechanism, wherein a first mounting cavity (7) is formed in the first mounting rod (1), first measuring ports (8) communicated with the first mounting cavity (7) are formed in two ends of the first mounting cavity (7), the number of the first measuring rods (3) is two, the two first measuring rods (3) are arranged in the first mounting cavity (7), one first measuring rod (3) can stretch relative to one first measuring port (8), and the other first measuring rod (3) can stretch relative to the other first measuring port (8);
the first mounting rod (1) and the second mounting rod (2) are the same in length, and the central point of the second mounting rod (2) is rotatably connected with the central point of the first mounting rod (1);
the second mounting rod (2) is provided with a second mounting cavity (9), two ends of the second mounting cavity (9) are respectively provided with a second measuring port (10) communicated with the second mounting cavity (9), the number of the second measuring rods (4) is two, the two second measuring rods (4) are respectively arranged in the second mounting cavity (9), one second measuring rod (4) can stretch and retract relative to one second measuring port (10), and the other second measuring rod (4) can stretch and retract relative to the other second measuring port (10);
scales (11) are arranged on the first measuring rod (3) and the second measuring rod (4);
the first driving mechanism (5) is used for driving the two first measuring rods (3) to synchronously extend and retract, and the second driving mechanism is used for driving the two second measuring rods (4) to synchronously extend and retract.
2. The house squareness measuring device with higher measuring accuracy according to claim 1, characterized in that: the first driving mechanism (5) is arranged in the first installation cavity (7).
3. The house squareness measuring device with higher measuring accuracy according to claim 2, characterized in that: the first driving mechanism (5) comprises a bidirectional screw (51), a first moving sleeve (52) and a second moving sleeve (53), and the bidirectional screw (51) is rotatably arranged in the first mounting cavity (7);
the length direction of the bidirectional screw (51) is the same as that of the first mounting rod (1);
the bidirectional screw (51) is provided with a first screw section (511) and a second screw section (512) which have opposite threads, the first movable sleeve (52) is sleeved on the first screw section (511) in a threaded manner, and the second movable sleeve (53) is sleeved on the second screw section (512) in a threaded manner;
the first moving sleeve (52) is fixedly connected with one first measuring rod (3), and the second moving sleeve (53) is fixedly connected with the other first measuring rod (3);
the cavity wall of the first installation cavity (7) is provided with a limiting part, and the limiting part is used for limiting the first moving sleeve (52) and the second moving sleeve (53) so that the first moving sleeve (52) and the second moving sleeve (53) are driven to move along the length direction of the bidirectional screw (51).
4. The house squareness measuring device with higher measuring accuracy according to claim 3, characterized in that: the limiting part is a limiting groove (12), and the length direction of the limiting groove (12) is consistent with the length direction of the bidirectional screw (51); the limiting groove (12) is formed in the wall of the first installation cavity (7), the first moving sleeve (52) is provided with a first limiting block (13), the second moving sleeve (53) is provided with a second limiting block (14), and the first limiting block (13) and the second limiting block (14) are inserted into the limiting groove (12).
5. The house squareness measuring device with higher measuring accuracy according to claim 4, characterized in that: still include reversing mechanism (6), reversing mechanism (6) include first face gear (61), second face gear (62) and reversing bar (63), first face gear (61) is fixed to be established on two-way screw rod (51), second face gear (62) with first face gear (61) meshing, second face gear (62) is fixed to be established on reversing bar (63), the length axis direction of reversing bar (63) with the length axial direction of two-way screw rod (51) is perpendicular.
6. The house squareness measuring device with higher measuring accuracy according to claim 5, characterized in that: still including rotating handle (15), first terminal surface gear (61) and second terminal surface gear (62) all are located in first installation cavity (7), first installation cavity (7) are worn out to reversing lever (63) the tip that deviates from second terminal surface gear (62), it establishes to rotate handle (15) fixed cover reversing lever (63) wears out the tip of second installation cavity (9).
7. The apparatus according to any one of claims 1 to 6, wherein the apparatus comprises: a first rotating part (16) is arranged at the central point of the first mounting rod (1), and a clamping block (18) is arranged on the first rotating part (16);
the center point of the second mounting rod (2) is provided with a second rotating part (17), and the second rotating part (17) is provided with a plurality of clamping grooves (19) for inserting the clamping blocks (18) at intervals along the circumferential direction.
8. The apparatus of claim 7, wherein the apparatus comprises: the second driving mechanism is identical in structure with the first driving mechanism (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021799014.1U CN212673991U (en) | 2020-08-24 | 2020-08-24 | House squareness measuring device with high measuring precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021799014.1U CN212673991U (en) | 2020-08-24 | 2020-08-24 | House squareness measuring device with high measuring precision |
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| Publication Number | Publication Date |
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| CN212673991U true CN212673991U (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021799014.1U Active CN212673991U (en) | 2020-08-24 | 2020-08-24 | House squareness measuring device with high measuring precision |
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| CN (1) | CN212673991U (en) |
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2020
- 2020-08-24 CN CN202021799014.1U patent/CN212673991U/en active Active
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