CN111964644B - Distance measuring device with multiple functions - Google Patents
Distance measuring device with multiple functions Download PDFInfo
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- CN111964644B CN111964644B CN202011145249.3A CN202011145249A CN111964644B CN 111964644 B CN111964644 B CN 111964644B CN 202011145249 A CN202011145249 A CN 202011145249A CN 111964644 B CN111964644 B CN 111964644B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
Abstract
The invention discloses a multifunctional distance measuring device which comprises an installation plate, wherein the top of the installation plate is fixedly connected with a vertical cylinder, a surveying instrument is arranged above a bottom frame, and an adjusting assembly is arranged above the bottom frame. This distance measuring device who possesses multiple functions, the clearance fit of accessible horizontal pole and horizontal section of thick bamboo, and the horizontal pole links to each other with the joint of second gear, first gear is connected with the meshing of ring gear, make outside pulling horizontal pole and rotate and can carry out axial rotation regulation and fixed to the surveying instrument, and then make the surveying instrument can realize 360 annular multi-angle surveys and drawing of axial, the clearance fit of accessible slide bar and slide rail, and the draw-in groove links to each other with the joint of bayonet lock, promote measuring efficiency, accessible third gear links to each other with the joint of bayonet lock, and bayonet lock and telescopic clearance fit, give under the effect of the clockwise pivoted force of disk at torsion spring, can make the angularly adjustable of layer board, and then be convenient for place the paper and carry out the record to measured data, promote measurement accuracy.
Description
Technical Field
The invention relates to the technical field of distance measuring devices with multiple functions, in particular to a distance measuring device with multiple functions.
Background
Distance measurement refers to the work of measuring the length of a two-point connecting line on the ground, and usually requires the measurement of a horizontal distance, i.e. the length of the two-point connecting line projected on a certain level, which is one of the elements for determining the plane position of a ground point and is one of the most basic tasks in the measurement work, and usually requires the measurement of a horizontal distance, i.e. the length of the two-point connecting line projected on a certain level.
Distance measuring device who possesses multiple functions among the prior art is when using, can not carry out axial rotation to the surveying instrument and adjust and fix, and then make the surveying instrument can not realize 360 annular multi-angle surveys of axial, greatly reduced measures the convenience, and can not drive the horizontal migration position of surveying instrument, and then be not suitable for multiple measuring environment, reduce measuring efficiency, prolong operating time, and do not possess the layer board, lead to being not convenient for to place the paper and take notes measured data, make measuring accuracy lead to the mistake because of the negligence easily, and then inconvenient people use.
Disclosure of Invention
The invention aims to provide a distance measuring device with multiple functions, and the distance measuring device with multiple functions is used for solving the problems that when the distance measuring device with multiple functions in the prior art is used, a surveying instrument cannot be axially rotated, adjusted and fixed, so that the surveying instrument cannot realize axial 360-ring multi-angle surveying and mapping, the measuring convenience is greatly reduced, the surveying instrument cannot be driven to transversely and horizontally move, and further the distance measuring device is not suitable for multiple measuring environments, the measuring efficiency is reduced, and the working time is prolonged.
In order to achieve the purpose, the invention provides the following technical scheme: a multifunctional distance measuring device comprises a mounting plate, wherein a vertical cylinder is fixedly connected to the top of the mounting plate, a vertical rod is in clearance fit with the inner wall of the vertical cylinder, a bolt is in threaded connection with the left end of the vertical cylinder, a bottom frame is fixedly connected to the top of the vertical rod, a surveying instrument is arranged above the bottom frame, and an adjusting assembly is arranged above the bottom frame;
the adjusting component comprises a circular plate, a gear ring, a first gear, a transverse cylinder, a transverse rod, a second gear, a clamping plate, a first compression spring, a sliding rail, a sliding rod, a clamping pin, a second compression spring, a clamping groove and a pointer;
the outer wall of the circular plate is rotatably connected with the top of the underframe through a bearing, a gear ring is fixedly connected to the bottom of the circular plate, a first gear is meshed and connected to the left side of the bottom of the gear ring, a transverse cylinder is fixedly connected to the inner wall of the first gear, the outer wall of the transverse cylinder is rotatably connected with the left end of the underframe through a bearing, a transverse rod is in clearance fit with the inner wall of the transverse cylinder, a second gear is clamped to the right end of the transverse rod, the top of the second gear is fixedly connected with the bottom of the circular plate, a clamping plate is fixedly connected to the outer wall of the transverse rod, a first compression spring is sleeved on the outer wall of the transverse rod, two ends of the first compression spring are respectively fixedly connected with the transverse cylinder and the clamping plate, a sliding rail is fixedly connected with the top of the circular plate, a sliding rod is in clearance fit with the inner wall of the sliding rail, the top of the sliding rod is fixedly connected with the bottom of the surveying instrument, and a clamping pin is in clearance fit with the inner wall of the sliding rod, the top rigid coupling of bayonet lock has second compression spring, the bottom of second compression spring and the top fixed connection of bayonet lock, the bottom joint of bayonet lock has the draw-in groove, the draw-in groove is processed in the inner wall bottom of slide rail.
Preferably, the shape of the bayonet lock is matched with that of the clamping groove, and the cross sections of the bayonet lock and the clamping groove are both in a regular trapezoid shape.
Preferably, the clamping grooves are distributed in a transverse equidistant mode.
Preferably, the gear ring and the circular plate are arranged concentrically, and the gear ring and the first gear are in a meshed state.
Preferably, a recording component is arranged at the right end of the vertical cylinder;
the recording assembly comprises a support, a rotating rod, a supporting plate, a third gear, a clamping rod, a sleeve, a round block, a round rod and a torsion spring;
the left end of support and the right-hand member top fixed connection of a vertical section of thick bamboo, the right-hand member rigid coupling of support has the bull stick, the outer wall of bull stick rotates and is connected with the layer board, the positive rigid coupling of bull stick has the third gear, the right-hand member joint of third gear has the kelly, the outer wall clearance fit of kelly has the sleeve, telescopic rear end and the fixed connection of layer board, the right-hand member of kelly supports tightly has the circle piece, the positive right side of circle piece is passed through the circle pole and is rotated with the positive right side of layer board and be connected, the outer wall of circle pole has cup jointed torque spring, torque spring's top and the fixed connection of layer board, torque spring's bottom and the fixed connection of circle piece.
Preferably, the third gear is arranged corresponding to the clamping rod in position, and the third gear and the clamping rod form a clamping structure.
Preferably, the round block and the round rod are arranged in an eccentric position, and the outer wall of the round block is machined with grinding grains.
Compared with the prior art, the invention has the beneficial effects that:
this distance measuring device who possesses multiple functions, through the mounting panel, the chimney, the montant, the bolt, the chassis, surveying instrument and adjusting part's cooperation, make the device when using, the clearance fit of accessible horizontal pole and horizontal section of thick bamboo, and the joint of horizontal pole and second gear links to each other, first gear is connected with the meshing of ring gear, make outside pulling horizontal pole and rotation can carry out the axial rotation to the surveying instrument and adjust and fix, and then make the surveying instrument can realize 360 annular multi-angle surveys of axial, promote the measurement convenience greatly.
This distance measuring device who possesses multiple functions, through the mounting panel, the vertical cylinder, the montant, the bolt, the chassis, surveying instrument and adjusting part's cooperation, make the device when using, the clearance fit of accessible slide bar and slide rail, and the draw-in groove links to each other with the joint of bayonet lock, under second compression spring's effect, the slide bar can drive the horizontal migration position of surveying instrument when receiving a power, and then is applicable to multiple measuring environment, promote measuring efficiency greatly, save operating time.
This distance measuring device who possesses multiple functions through the cooperation of mounting panel, vertical cylinder, montant, bolt, chassis and surveying instrument for the device is when using, and the clearance fit of accessible montant and vertical cylinder to and the setting of bolt can highly adjust surveying instrument, further promotes the convenient degree of measurement.
This distance measuring device who possesses multiple functions, the mounting panel, a vertical section of thick bamboo, the montant, the bolt, the chassis, the cooperation of surveying instrument and record subassembly for the device is when using, and the accessible third gear links to each other with the joint of kelly, and kelly and telescopic clearance fit, give the effect of the clockwise pivoted force of circle piece at torsion spring, can make the angularly adjustable of layer board, and then be convenient for place the paper and carry out the record to measured data, promote measurement accuracy, make things convenient for people to use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cross-barrel, cross-bar and first gear of FIG. 1;
FIG. 3 is a schematic view of the structure of the pointer, circular plate and bottom frame of FIG. 1;
FIG. 4 is a schematic structural view of the bayonet, the bayonet and the slide rod in FIG. 1;
FIG. 5 is a schematic view of the construction of the turn bar, pallet and column of FIG. 1;
fig. 6 is a schematic view of the structure of the round block, the sleeve and the round rod in fig. 5.
In the figure: 1. mounting plate, 2, vertical cylinder, 3, vertical rod, 4, bolt, 5, underframe, 6, surveying instrument, 7, adjusting component, 701, circular plate, 702, gear ring, 703, first gear, 704, horizontal cylinder, 705, cross rod, 706, second gear, 707, snap-gauge, 708, first compression spring, 709, slide rail, 710, slide bar, 711, bayonet, 712, second compression spring, 713, bayonet slot, 714, pointer, 8, recording component, 801, bracket, 802, rotating rod, 803, support plate, 804, third gear, 805, bayonet, 806, sleeve, 807, round block, 808, round rod, 809, torsion spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
example 1
A distance measuring device with multiple functions comprises a mounting plate 1, wherein a vertical cylinder 2 is fixedly connected to the top of the mounting plate 1, a vertical rod 3 is in clearance fit with the inner wall of the vertical cylinder 2, the vertical cylinder 2 plays a role in guiding the vertical rod 3, a bolt 4 is in threaded connection with the left end of the vertical cylinder 2, the bolt 4 plays a role in fixing the vertical rod 3, a bottom frame 5 is fixedly connected to the top of the vertical rod 3, scales are machined on the outer wall of the bottom frame 5, a surveying instrument 6 is arranged above the bottom frame 5, and an adjusting assembly 7 is arranged above the bottom frame 5;
the adjusting component 7 comprises a circular plate 701, a gear ring 702, a first gear 703, a transverse cylinder 704, a cross bar 705, a second gear 706, a clamping plate 707, a first compression spring 708, a sliding rail 709, a sliding rod 710, a clamping pin 711, a second compression spring 712, a clamping groove 713 and a pointer 714, wherein the outer wall of the circular plate 701 is rotatably connected with the top of the underframe 5 through a bearing, the gear ring 702 is fixedly connected with the bottom of the circular plate 701, the gear ring 702 is concentrically arranged with the circular plate 701, and the gear ring 702 is in a meshing state with the first gear 703, so that the circular plate 701 can rotate along with the gear ring 702, the left side of the bottom of the gear ring 702 is in meshing connection with the first gear 703, the inner wall of the first gear 703 is fixedly connected with the transverse cylinder 704, the outer wall of the transverse cylinder 704 is rotatably connected with the left end of the underframe 5 through a bearing, the inner wall of the transverse cylinder 704 is in clearance fit with the cross bar 705, the left end of the cross bar 705 is fixedly connected with a handle, the right end of the cross bar 705 is clamped with the second gear 706, the top of the second gear 706 is fixedly connected with the bottom of the circular plate 701, a clamping plate 707 is fixedly connected to the outer wall of the cross bar 705, a first compression spring 708 is sleeved on the outer wall of the cross bar 705, the first compression spring 708 gives a rightward force to the clamping plate 707, two ends of the first compression spring 708 are fixedly connected with the cross cylinder 704 and the clamping plate 707 respectively, a sliding rail 709 is fixedly connected to the top of the circular plate 701, a sliding rod 710 is in clearance fit with the inner wall of the sliding rail 709, the top of the sliding rod 710 is fixedly connected with the bottom of the surveying instrument 6, a clamping pin 711 is in clearance fit with the inner wall of the sliding rod 710, a second compression spring 712 is fixedly connected to the top of the clamping pin 711, a downward force is given to the clamping pin 711 by the second compression spring 712, a clamping groove 713 is clamped to the bottom of the clamping pin 711, the clamping pin 711 is matched with the clamping groove 713 in shape, and the clamping pin 711 and the clamping groove 713 are in a regular trapezoid shape in cross section, so that the sliding rod 710 can slide transversely when being stressed and can be fixed when not being stressed, the locking grooves 713 are formed in the bottom of the inner wall of the sliding rail 709, and the locking grooves 713 are distributed in a transverse equidistant mode, so that the sliding rod 710 can be adjusted and fixed in a transverse direction.
Example 2
As an optional situation, referring to fig. 1, 5 and 6, a distance measuring device with multiple functions, a recording assembly 8 is arranged at the right end of a vertical cylinder 2, the recording assembly 8 comprises a support 801, a rotating rod 802, a supporting plate 803, a third gear 804, a clamping rod 805, a sleeve 806, a round block 807, a round rod 808 and a torsion spring 809, the left end of the support 801 is fixedly connected with the upper part of the right end of the vertical cylinder 2, the right end of the support 801 is fixedly connected with the rotating rod 802, the outer wall of the rotating rod 802 is rotatably connected with the supporting plate 803, the front surface of the rotating rod 802 is fixedly connected with the third gear 804, the right end of the third gear 804 is clamped with the clamping rod 805, the third gear 804 and the clamping rod 805 are arranged in a position corresponding to each other, and the third gear 804 and the clamping rod 805 form a clamping structure, so that the angle of the supporting plate 803 can be adjusted, the outer wall of the clamping rod 805 is in clearance fit with the sleeve 806, the sleeve 806 plays a guiding role on the clamping rod 805, and the rear end of the sleeve 806 is fixedly connected with the supporting plate 803, the right-hand member of kelly 805 supports tightly has the circle piece 807, circle piece 807 is the eccentric position setting with circle pole 808, and the outer wall processing of circle piece 807 has the abrasive grain, the design makes circle piece 807 can give the power that the kelly 805 supported tightly left, and can increase the friction of circle piece 807 outer wall, the front right side of circle piece 807 is rotated through the front right side of circle pole 808 with layer board 803 and is connected, the outer wall of circle pole 808 has cup jointed torsion spring 809, torsion spring 809 gives the power that circle piece 807 clockwise turned, torsion spring 809's top and the fixed connection of layer board 803, torsion spring 809's bottom and the fixed connection of circle piece 807.
The scheme in this embodiment can be selectively combined with the scheme in other embodiments.
Example 3
An application of a distance measuring device with multiple functions is disclosed, in this embodiment, when using the distance measuring device with multiple functions, firstly, the mounting plate 1 is fixedly connected with an external tripod, the height of the surveying instrument 6 can be adjusted through the clearance fit of the vertical rod 3 and the vertical cylinder 2 and the arrangement of the bolt 4, meanwhile, the cross rod 705 is pulled leftwards, the cross rod 705 and the second gear 706 can be clamped and separated, at the same time, the cross rod 705 is rotated, the circular plate 701 can drive the surveying instrument 6 to axially rotate and adjust through the meshing connection of the first gear 703 and the gear ring 702, otherwise, the cross rod and the second gear can be clamped again, thereby realizing multi-angle surveying and mapping, at the same time, the slide rail 709 and the slide bar 710 are in clearance fit, the clamping connection of the clamping pin 711 and the clamping groove 713 are connected, under the action of the second compression spring 712, the slide bar 710 can transversely drive the surveying instrument 6 to adjust the position left and right when being subjected to a certain force, and then be suitable for multiple survey and drawing environment, stir kelly 805 to the right, make kelly 805 and third gear 804 joint separation, be connected through the rotation of bull stick 802 with layer board 803, make layer board 803 rotatable, and give circle block 807 clockwise pivoted power through torsion spring 809 and with kelly 805 and third gear 804 joint once more, make layer board 803 open horizontally or vertical accomodating, and then can put the paper at layer board 803 top, convenient to use person records measured data, make things convenient for people to use.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A method for using a multifunctional distance measuring device is characterized in that:
the multifunctional distance measuring device comprises a mounting plate (1), wherein a vertical cylinder (2) is fixedly connected to the top of the mounting plate (1), a vertical rod (3) is in clearance fit with the inner wall of the vertical cylinder (2), a bolt (4) is in threaded connection with the left end of the vertical cylinder (2), a bottom frame (5) is fixedly connected to the top of the vertical rod (3), a surveying instrument (6) is arranged above the bottom frame (5), and an adjusting assembly (7) is arranged above the bottom frame (5); the adjusting component (7) comprises a circular plate (701), a gear ring (702), a first gear (703), a transverse cylinder (704), a transverse rod (705), a second gear (706), a clamping plate (707), a first compression spring (708), a sliding rail (709), a sliding rod (710), a clamping pin (711), a second compression spring (712), a clamping groove (713) and a pointer (714); the outer wall of the circular plate (701) is rotatably connected with the top of the underframe (5) through a bearing, a gear ring (702) is fixedly connected to the bottom of the circular plate (701), a first gear (703) is meshed and connected to the left side of the bottom of the gear ring (702), a transverse cylinder (704) is fixedly connected to the inner wall of the first gear (703), the outer wall of the transverse cylinder (704) is rotatably connected with the left end of the underframe (5) through a bearing, a cross rod (705) is in clearance fit with the inner wall of the transverse cylinder (704), a second gear (706) is clamped at the right end of the cross rod (705), the top of the second gear (706) is fixedly connected with the bottom of the circular plate (701), a clamping plate (707) is fixedly connected to the outer wall of the cross rod (705), a first compression spring (708) is sleeved on the outer wall of the cross rod (705), and two ends of the first compression spring (708) are respectively fixedly connected with the transverse cylinder (704) and the clamping plate (707), a sliding rail (709) is fixedly connected to the top of the circular plate (701), a sliding rod (710) is in clearance fit with the inner wall of the sliding rail (709), the top of the sliding rod (710) is fixedly connected with the bottom of the surveying instrument (6), a clamping pin (711) is in clearance fit with the inner wall of the sliding rod (710), a second compression spring (712) is fixedly connected to the top of the clamping pin (711), the bottom of the second compression spring (712) is fixedly connected with the top of the clamping pin (711), a clamping groove (713) is clamped to the bottom of the clamping pin (711), and the clamping groove (713) is machined at the bottom of the inner wall of the sliding rail (709); a recording component (8) is arranged at the right end of the vertical cylinder (2); the recording assembly (8) comprises a bracket (801), a rotating rod (802), a supporting plate (803), a third gear (804), a clamping rod (805), a sleeve (806), a round block (807), a round rod (808) and a torsion spring (809); the left end of the bracket (801) is fixedly connected with the upper part of the right end of the vertical cylinder (2), the right end of the bracket (801) is fixedly connected with a rotating rod (802), the outer wall of the rotating rod (802) is rotatably connected with a supporting plate (803), the front surface of the rotating rod (802) is fixedly connected with a third gear (804), a clamping rod (805) is clamped at the right end of the third gear (804), a sleeve (806) is in clearance fit with the outer wall of the clamping rod (805), the rear end of the sleeve (806) is fixedly connected with the supporting plate (803), the right end of the clamping rod (805) is tightly propped against a round block (807), the right side of the front surface of the round block (807) is rotatably connected with the right side of the front surface of the supporting plate (803) through a round rod (808), a torsion spring (809) is sleeved on the outer wall of the round rod (808), the top end of the torsion spring (809) is fixedly connected with the supporting plate (803), and the bottom end of the torsion spring (809) is fixedly connected with the round block (807); the bayonet (711) is matched with the clamping groove (713) in shape, and the cross sections of the bayonet (711) and the clamping groove (713) are in a regular trapezoid shape; the clamping grooves (713) are distributed in a transverse equidistant mode, the gear ring (702) and the circular plate (701) are concentrically arranged, the gear ring (702) and the first gear (703) are in an engaged state, the circular block (807) and the circular rod (808) are arranged in an eccentric position, grinding grains are machined on the outer wall of the circular block (807), and the third gear (804) and the clamping rod (805) form a clamping structure;
the using method comprises the following steps: firstly, the mounting plate is fixedly connected with an external tripod, the height of the surveying instrument can be adjusted through the clearance fit of the vertical rod and the vertical cylinder and the arrangement of the bolt, meanwhile, the horizontal rod is pulled leftwards to enable the horizontal rod to be clamped and separated with the second gear, at the same time, the horizontal rod is rotated and is connected with the gear ring through the meshing of the first gear, the circular plate can drive the surveying instrument to axially rotate and adjust, otherwise, the horizontal rod and the second gear can be clamped and separated again, so that multi-angle surveying and mapping are realized, meanwhile, the clearance fit of the slide rail and the slide rod is realized, the clamping pin is connected with the clamping groove in a clamping way, under the action of the second compression spring, the slide rod can transversely drive the surveying instrument to adjust the left and right position when being subjected to certain force, so that various surveying and mapping environments are suitable, the clamping rod is shifted rightwards to enable the clamping rod to be clamped and separated with the third gear, and the supporting plate can rotate through the rotary connection of the rotary rod and the supporting plate, so that the supporting plate can rotate, and give the round block clockwise pivoted power through torsion spring and with kelly and third gear joint once more for but the layer board level opens or vertical accomodating, and then can put the paper at the layer board top, and convenient to use person takes notes measurement data, makes things convenient for people to use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011145249.3A CN111964644B (en) | 2020-10-23 | 2020-10-23 | Distance measuring device with multiple functions |
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|---|---|---|---|
| CN202011145249.3A CN111964644B (en) | 2020-10-23 | 2020-10-23 | Distance measuring device with multiple functions |
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| CN111964644A CN111964644A (en) | 2020-11-20 |
| CN111964644B true CN111964644B (en) | 2021-07-30 |
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| CN112984329B (en) * | 2021-03-05 | 2022-06-21 | 重庆市市建工程建设咨询有限公司 | Multifunctional construction engineering budget rehearsal equipment |
| CN113404911A (en) * | 2021-05-12 | 2021-09-17 | 何茜 | Automatic change hydrovalve |
| CN113608320A (en) * | 2021-10-08 | 2021-11-05 | 苏州思源科安信息技术有限公司 | Zoom lens device for face recognition |
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| CN210346698U (en) * | 2019-09-25 | 2020-04-17 | 福建骏锦建设发展有限公司 | Special measuring platform of multi-use architecture design |
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| JPH0389107A (en) * | 1989-08-31 | 1991-04-15 | Topcon Corp | Fine adjusting device of surveying instrument |
| CN202301426U (en) * | 2011-09-16 | 2012-07-04 | 李忠华 | Ratchet type hinge device |
| CN206695800U (en) * | 2017-04-13 | 2017-12-01 | 河南城建学院 | A kind of surveying instrument inching gear |
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| CN111964644A (en) | 2020-11-20 |
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