CN112325863A - On-spot mapping device of building engineering cost - Google Patents
On-spot mapping device of building engineering cost Download PDFInfo
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- CN112325863A CN112325863A CN202011183685.XA CN202011183685A CN112325863A CN 112325863 A CN112325863 A CN 112325863A CN 202011183685 A CN202011183685 A CN 202011183685A CN 112325863 A CN112325863 A CN 112325863A
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- box body
- solar panel
- piston
- mapping device
- total station
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- 238000013507 mapping Methods 0.000 title claims abstract description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000004065 semiconductor Substances 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 21
- 230000006378 damage Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
This scheme belongs to survey and drawing technical field, discloses a building engineering cost on-the-spot mapping device. The total station comprises a total station, a bracket, a mounting plate and a box body, wherein the mounting plate is detachably connected with the total station and the box body respectively; be equipped with box body and bracing piece on the mounting panel, be equipped with the ethanol in the box body, the box body opening part is connected with the pipeline, be equipped with the piston in the pipeline, a confined space is constituteed to piston and box body, be equipped with the rack on the piston, be equipped with the gear with rack looks meshing on the montant, solar panel is located the total powerstation top, solar panel electric connection has the battery, battery electric connection has the semiconductor refrigeration piece, the semiconductor refrigeration piece sets up on both ends open-ended box. This scheme is through setting up solar panel and semiconductor refrigeration piece, protects for mapping device, has avoided mapping device to receive the harm at high temperature and rainy day during operation.
Description
Technical Field
This scheme belongs to survey and drawing technical field, concretely relates to on-spot mapping device of building engineering cost.
Background
The construction cost refers to the construction price of the project, and refers to the total sum of all the expenses expected or actually required for completing the construction of one project. Surveying and mapping are measurement and mapping, a computer technology, a photoelectric technology, a network communication technology, space science and information science are taken as bases, a global navigation satellite positioning system (GNSS), Remote Sensing (RS) and a Geographic Information System (GIS) are taken as technical cores, existing feature points and boundary lines on the ground are measured to obtain figure and position information reflecting the current situation of the ground, the figure and the position information are used for planning and design and administrative management of engineering construction, and a total station is often used for assisting site construction in the construction engineering.
The total station is widely applied to construction engineering as an advanced surveying and mapping instrument, at present, when planning, designing, constructing and managing in engineering construction, the total station needs to work in open places and in the field, and can catch up with rain or hot summer in many times, and the total station and measurement data can be influenced to a certain extent no matter the total station is drenched with rain or is exposed to the sun.
Patent publication No. CN209623702U discloses a rain-proof and sun-proof surveying instrument bracket for outdoor use, which comprises a fixing structure for fixing the surveying instrument; an adjustment structure disposed on a lower surface of the fixed structure, the adjustment structure for adjusting the surveying instrument; a support structure for supporting the device; the bearing plate is a polygonal bearing plate and is used for connecting the adjusting structure and the supporting structure; the telescopic adjusting structure is arranged on the adjusting structure and is used for telescopic adjustment; the protection shed is arranged on the telescopic adjusting structure.
This scheme is through the expansion of protection canopy, can effectually prevent sunshine and rainwater to surveying and mapping personnel's injury, but does not carry out fine protection to the total powerstation, and when sunshine penetrates the instrument directly, the electronic components inside the total powerstation receives temperature influence performance unstability, leads to measuring to have the deviation, and too high temperature causes the ageing yellow of total powerstation display screen easily moreover. The circuit is easy to be damaged by water inflow in rainy days.
Disclosure of Invention
This scheme provides a building engineering cost on-spot mapping device to solve prior art when high temperature weather and rainy day, the problem that the surveying instrument can not be fine receives the protection.
In order to achieve the purpose, the scheme provides a construction engineering cost field mapping device which comprises a total station, a support, a mounting plate and a box body, wherein openings are formed in two ends of the box body, the same screw holes are formed in the support and the mounting plate, the mounting plate is mounted on the support through mutually matched screws and nuts, the mounting plate is detachably connected with the total station and the box body respectively, and the total station is arranged in the box body; the solar panel comprises a mounting plate and a solar panel body, wherein the mounting plate is provided with a box body and a support rod, ethanol is arranged in the box body, a pipeline is connected to an opening of the box body, the box body is horizontally positioned on the outer side of the solar panel, and the pipeline is positioned below the solar panel; one end of the supporting rod is fixed on the mounting plate, and the other end of the supporting rod is connected with the pipeline; the solar energy total station comprises a pipeline, and is characterized in that a piston is arranged in the pipeline, a sealed space is formed by the piston and a box body, a rack is arranged on the piston, a bearing is installed on an installation plate, the bearing is connected with a vertical rod in a rotating mode, a solar panel is connected to the upper end of the vertical rod, a gear meshed with the rack is arranged on the vertical rod, the solar panel is located above the total station, the solar panel is electrically connected with a storage battery, the storage battery is electrically connected with a semiconductor refrigeration piece, the semiconductor refrigeration piece is arranged on a box body with two openings at two ends, a refrigeration surface of the semiconductor refrigeration piece is close.
The principle of the scheme is as follows: when the weather is hot, the ethanol in the box body is heated and vaporized under the sealing environment at high temperature, and then expands to increase the pressure in the sealing space formed by the box body and the piston, the increased pressure pushes the piston to move towards the direction far away from the pipeline, the gear meshed with the piston is driven to rotate by the rack in the moving process of the piston, the gear rotates to drive the vertical rod to rotate, the vertical rod is arranged on the mounting plate by the bearing, the vertical rod can rotate relative to the mounting plate, and because the solar panel is arranged on the vertical rod, the vertical rod rotates to drive the solar panel to rotate, when the sunlight irradiates at different angles, all parts of the solar panel can absorb the sunlight, the solar panel absorbs the sunlight to generate electric energy to be stored in the storage battery, and the storage battery supplies power to the semiconductor refrigerating sheet, so that the semiconductor refrigerating sheet can continuously refrigerate and cool the total station which continuously works at high temperature. The both ends opening of box makes things convenient for surveying and mapping personnel when surveying and mapping, sees through the total powerstation to the place that needs the measurement from box one end opening part, from box other end opening part operation total powerstation. And the support rod supports the weight of the case, the pipe, the piston, and the rack bar together with the case.
Because the box body horizontal direction is located the solar panel outside, the box body does not shelter from in the atmosphere at solar panel promptly, so sunshine can the direct irradiation box body for ethanol in the box body can heat up the vaporization rapidly, and then the inflation makes the pressure increase in the enclosure space that box body and piston constitute, and the pressure of increase promotes the piston and removes toward the direction of keeping away from the pipeline. And the pipeline shelters from the within range at solar panel, can not be penetrated directly by the sunlight, the temperature is lower than the box body, then can liquefy when the ethanol that vaporizes gets into microthermal pipeline, make the pressure increase in the confined space that box body and piston are constituteed, and then give a suction of piston, make the piston remove towards the box body direction, the rack drives the gear revolve of meshing with it, and then drive the montant and rotate, the montant rotates and then drives solar panel and rotate, so relapse can the interior ethanol of cyclic utilization box body, make solar panel can continuously rotate, better absorption sunlight, produce more solar energy, and then turn into more electric energy, store in the battery.
When the rain weather is met, the ethanol in the box body is not heated and vaporized, the piston is not moved, the vertical rods and the solar panel are not rotated, and the total station is located below the solar panel and can well avoid rainwater drenching because the solar panel has a rainproof function.
The beneficial effect of this scheme does: utilize the characteristic of high temperature hot weather originally, turn into the heat energy of catalysis ethanol vaporization with hot high temperature, make the ethanol of vaporization can make the piston remove, make the rack on the piston drive the gear revolve, and then the gear drives montant and solar panel and rotates, make each part of solar panel can both be abundant absorb the sunlight, and then turn into the electric energy with solar energy and supply power for the semiconductor refrigeration piece, cool down for the total station, make the total station work under a very safe temperature environment, certain harm has been avoided causing for the instrument. Meanwhile, the solar panel is located right above the total station to avoid direct irradiation of sunlight, so that the measurement accuracy is accurate. Meanwhile, the solar panel has a rain-proof function, so that the total station can be prevented from being wetted by rainwater, the measurement of the total station cannot be influenced even in rainy days, the surveying and mapping work cannot be delayed, and the working efficiency is improved.
Further, the support is collapsible tripod, and the tripod shape has the steadiness, and the total powerstation is difficult to fall down when the survey and drawing, collapsible when receiving and releasing moreover, and occupation space is little.
Further, the box body and the pipeline are obliquely arranged. If the box body is horizontally arranged, the ethanol in the box body can moisten the wall of the pipeline through which the piston passes when the piston moves back and forth, so that the sliding of the piston is influenced, and the oblique arrangement can enable the liquid ethanol in the box body to stay in the box body, so that the sealing performance of a closed space formed between the piston and the box body is maintained.
Further, still include the umbrella stand, solar panel installs on the umbrella stand, the umbrella stand is installed on the montant. The umbrella stand has the function of receiving and releasing, and when needs used solar panel, can open solar panel through opening the umbrella stand, when need not use, through the umbrella stand receive solar panel can.
Furthermore, the box body is made of stainless steel, so that heat conduction is fast during solar irradiation, and the box body cannot rust when being wetted by rainwater.
Further, be equipped with a plurality of semiconductor refrigeration pieces on the box, because the total powerstation sets up in the box, a plurality of semiconductor refrigeration pieces on the box are better for the total powerstation cooling.
Further, solar panel and montant comprise firm light material, and the sturdiness of its material can make montant and solar panel's bearing nature better, and the light of material can be easier when solar panel and montant rotate, and is littleer to the frictional force of mounting panel.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: the total station comprises a total station 1, a support 2, a mounting plate 3, a box body 4, a pipeline 5, a piston 6, a rack 7, a gear 8, a vertical rod 9, a solar panel 10, a box body 11, a semiconductor refrigeration piece 12, a supporting rod 13, a bearing 14 and an umbrella stand 15.
The embodiment is basically as shown in the attached figure 1:
the utility model provides an on-spot mapping device of building engineering cost, includes total powerstation 1, support 2, mounting panel 3 and box 11, is equipped with the same screw on support 2 and the mounting panel 3, installs mounting panel 3 on support 2 through the screw and the nut of mutually supporting. The mounting plate 3 is detachably connected with the total station 1 and the box 11, respectively. The support 2 is in a tripod shape, and a stable triangle is formed by the three foot stands, so that the total station 1 is not easy to incline and drop when in use. The support 2 can be folded, the support 2 can be folded when not in use, and the support 2 can be unfolded when in use. The box 11 both ends are equipped with the opening, and both ends opening makes things convenient for surveying and mapping personnel when surveying and mapping, sees to the place that needs the measurement through total powerstation 1 from box 11 one end opening part, from box 11 other end opening part operation total powerstation 1.
Be equipped with box body 4 and bracing piece 13 on the mounting panel 3, the material of box body 4 is stainless steel material, and heat conduction is fast when the sun shines, meets the rainwater and drenches and also can not rust. Be equipped with the ethanol in the box body 4, 4 openings of box body are connected with pipeline 5, and 4 horizontal directions of box body are located the solar panel 10 outside, and pipeline 5 is located solar panel 10 below. One end of the support rod 13 is fixed on the mounting plate 3, and the other end is connected with the pipeline 5; a piston 6 is arranged in the pipeline 5, the piston 6 and the box body 4 form a sealed space, and a rack 7 is arranged on the piston 6. The support rod 13 supports the weight of the cartridge 4, the pipe 5 and the piston 6 together with the cartridge 4.
The box 4 and the pipe 5 are arranged obliquely. If box body 4 horizontal setting, the pipeline wall that piston 6 passes through is drenched to the ethanol in the box body 4 when piston 6 round trip movement, influences piston 6's slip, and the slope sets up and then can make the liquid ethanol in the box body 4 stay in box body 4, keeps constituting confined space's leakproofness between piston 6 and the box body 4.
Install bearing 14 on the mounting panel 3, bearing 14 rotates and is connected with montant 9, and the montant 9 upper end is connected with solar panel 10, is equipped with the gear 8 with rack 7 looks meshing on montant 9, and solar panel 10 is located total powerstation 1 and box 11 top. The horizontal area of solar panel 10 above total station 1 is larger than the total station, so that total station 1 and box 11 are within the shielding range of solar panel 10.
The box body 4 is horizontally arranged outside the solar panel 10, the pipeline 5 is arranged below the solar panel 10, and the pipeline 5 is obliquely arranged. Because the box body 4 is horizontally positioned outside the solar panel 10, namely the box body 4 is not in the atmosphere shielded by the solar panel 10, sunlight can directly irradiate the box body 4, so that ethanol in the box body 4 can be rapidly heated and vaporized, and further expanded to increase the pressure in the sealed space formed by the box body 4 and the piston 6, the piston 6 is pushed to move towards the direction far away from the pipeline 5 by the increased pressure, the gear 8 meshed with the piston 6 is driven to rotate by the rack 7 in the moving process of the piston 6, the gear 8 rotates to drive the vertical rod 9 to rotate, the vertical rod 9 is installed on the installation plate through the bearing 14, so the vertical rod 9 can rotate relative to the installation plate 3, because the solar panel 10 is installed on the vertical rod 9, the vertical rod 9 rotates to drive the solar panel 10 to rotate, when the sunlight irradiates at different angles, all parts of the solar panel 10 can, and the storage battery supplies power to the semiconductor refrigerating sheet 12, so that the semiconductor refrigerating sheet 12 continuously refrigerates and cools the total station 1 which continuously works at high temperature.
And pipeline 5 is because sheltering from the within range at solar panel 10, can not be penetrated directly by the sunlight, the temperature is lower than box body 4, then can liquefy after the ethanol that vaporizes gets into microthermal pipeline 5, make the pressure increase in the confined space that box body 4 and piston 6 constitute, and then give 6 a suction of piston, make piston 6 remove towards 4 directions of box body, and then drive rack 7 and remove, rack 7 drives montant 9 and rotates, montant 9 rotates then to drive solar panel 10 and rotates, so relapse can recycle the ethanol in the box body 4, make solar panel 10 can continuously rotate, better absorption sunlight, produce more solar energy, and then turn into more electric energy, store in the battery.
The vertical rod 9 is provided with an umbrella stand 15, the solar panel 10 is arranged on the umbrella stand 15, and the umbrella stand 15 is arranged on the vertical rod 9. The umbrella frame 15 has a folding and unfolding function, when the solar panel 10 is needed to be used, the solar panel 10 can be unfolded by unfolding the umbrella frame 15, and when the solar panel 10 is not needed to be used, the solar panel 10 can be folded by the umbrella frame 15.
The method comprises the following specific operations:
firstly, the bracket 2 is unfolded from a folded state, the three foot rests form a stable triangle, and the mounting plate 3 is fixed on the bracket 2 through mutually matched screws and nuts.
Then the total station 1, the support rod 13, the box body 11, the box body 4 filled with ethanol and the pipeline 5 are installed on the installation plate 3, the vertical rod 9 is rotatably connected with a bearing 14 on the installation plate 3, and the rack 7 on the piston 6 is meshed with the gear 8 on the vertical rod 9. Then, the semiconductor refrigerating piece 12 is installed on the box body 11, the refrigerating surface of the semiconductor refrigerating piece 12 is close to the total station 1 to cool the total station 1, and the radiating surface of the semiconductor refrigerating piece 12 faces back to the total station 1.
And pipeline 5 because shelter from the within range at solar panel 10, can not be penetrated directly by the sunlight, the temperature is lower than box body 4, then can liquefy when the ethanol of vaporization gets into microthermal pipeline 5, make piston 6 remove towards 4 directions of box body, and then drive rack 7 and remove, rack 7 drives the gear 8 rotation of meshing with it, gear 8 rotates and drives montant 9 and rotates, montant 9 rotates then and drives solar panel 10 and rotate, so relapse the ethanol in can the cyclic use box body 4, make solar panel 10 can continuously rotate, better absorption sunlight, produce more solar energy, and then turn into more electric energy, store in the battery.
When encountering rainy days, since solar panel 10 has a rain-proof function, solar panel 10 can prevent rainwater from wetting total station 1 even if measured in rainy days.
When in use, lubricating oil is periodically added to the bearing 14, the rack 7 and the gear 8 on the vertical rod 9, so that the bearing, the rack 7 and the gear can run more efficiently in work.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. The utility model provides an on-spot mapping device of building engineering cost, includes total powerstation (1), support (2), mounting panel (3) and box (11), its characterized in that: openings are formed in two ends of the box body (11), the same screw holes are formed in the support (2) and the mounting plate (3), the mounting plate (3) is mounted on the support (2) through mutually matched screws and nuts, the mounting plate (3) is detachably connected with the total station (1) and the box body (11) respectively, and the total station (1) is arranged in the box body (11); the solar water heater is characterized in that a box body (4) and a supporting rod (13) are arranged on the mounting plate (3), ethanol is arranged in the box body (4), a pipeline (5) is connected to an opening of the box body (4), the box body (4) is located on the outer side of the solar panel (10) in the horizontal direction, and the pipeline (5) is located below the solar panel (10); one end of the supporting rod (13) is fixed on the mounting plate (3), and the other end of the supporting rod (13) is connected with the pipeline (5); a piston (6) is arranged in the pipeline (5), the piston (6) and the box body (4) form a sealed space, a rack (7) is arranged on the piston (6), a bearing (14) is arranged on the mounting plate (3), the bearing (14) is rotatably connected with a vertical rod (9), the upper end of the vertical rod (9) is connected with a solar panel (10), the vertical rod (9) is provided with a gear (8) engaged with the rack (7), the solar panel (10) is positioned above the total station (1), the solar panel (10) is electrically connected with a storage battery, the storage battery is electrically connected with a semiconductor refrigerating sheet (12), the semiconductor refrigerating sheet (12) is arranged on a box body (11) with openings at two ends, the refrigerating surface of the semiconductor refrigerating piece (12) is close to the total station (1), and the radiating surface of the semiconductor refrigerating piece (12) faces back to the total station (1).
2. The construction cost on-site surveying and mapping device of claim 1, wherein: the support (2) is a foldable tripod.
3. The construction cost on-site surveying and mapping device of claim 1, wherein: the box body (4) and the pipeline (5) are obliquely arranged.
4. The construction cost on-site surveying and mapping device of claim 1, wherein: still include umbrella stand (15), solar panel (10) are installed on umbrella stand (15), umbrella stand (15) are installed on montant (9).
5. The construction cost on-site surveying and mapping device of claim 1, wherein: the box body (4) is made of stainless steel.
6. The construction cost on-site surveying and mapping device of claim 1, wherein: the box body (11) is provided with a plurality of semiconductor refrigerating pieces (12).
7. The construction cost on-site surveying and mapping device of claim 1, wherein: the solar panels (10) and the vertical rods (9) are made of firm and light materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183685.XA CN112325863A (en) | 2020-10-29 | 2020-10-29 | On-spot mapping device of building engineering cost |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183685.XA CN112325863A (en) | 2020-10-29 | 2020-10-29 | On-spot mapping device of building engineering cost |
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| CN112325863A true CN112325863A (en) | 2021-02-05 |
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| CN202011183685.XA Pending CN112325863A (en) | 2020-10-29 | 2020-10-29 | On-spot mapping device of building engineering cost |
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| CN207866248U (en) * | 2018-02-08 | 2018-09-14 | 四川岚强石油天然气工程勘察设计有限责任公司 | A kind of field total powerstation |
| CN207939459U (en) * | 2018-03-26 | 2018-10-02 | 南通东源新能源科技发展有限公司 | A kind of distributed photovoltaic power generation system |
| CN208109111U (en) * | 2018-05-10 | 2018-11-16 | 四川省冶地工程勘察设计有限公司 | A kind of total station foot rest |
| CN109480650A (en) * | 2018-11-21 | 2019-03-19 | 余杰 | A kind of barbecue rack of environmental protection |
| CN110445458A (en) * | 2019-09-05 | 2019-11-12 | 泉州市科茂利通智能科技有限公司 | A kind of solar panel convenient for adjusting |
| CN111337001A (en) * | 2020-04-13 | 2020-06-26 | 长沙职业技术学院 | On-spot mapping device of building engineering cost |
| CN210719182U (en) * | 2020-05-07 | 2020-06-09 | 潍坊昌大建设集团有限公司 | Civil engineering budget measuring instrument |
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Application publication date: 20210205 |