CN209326642U - A kind of engineering instrument of surveying and mapping regulating device - Google Patents
A kind of engineering instrument of surveying and mapping regulating device Download PDFInfo
- Publication number
- CN209326642U CN209326642U CN201820858554.9U CN201820858554U CN209326642U CN 209326642 U CN209326642 U CN 209326642U CN 201820858554 U CN201820858554 U CN 201820858554U CN 209326642 U CN209326642 U CN 209326642U
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- fixed
- shaft
- surveying
- mapping
- fixedly mounted
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Abstract
The utility model discloses a kind of engineering instrument of surveying and mapping regulating devices, including workbench, workbench upper surface is equipped with concave groove, placement plate is equipped in concave groove, air-bubble level and fixed device is fixedly mounted in placement plate upper surface, placement plate lower end surface articulated telescopic bar, placement plate center side wall end face is fixedly connected with shaft one, gear one is fixedly mounted in shaft one, gear one engages connection gear two, gear two is fixedly connected with shaft two, shaft two is fixedly connected with rocking bar, shaft is fixedly mounted at the center of workbench lower end surface, shaft is rotatablely connected height adjustment device, height adjustment device is fixedly connected with firm banking, fixed plate is fixedly mounted in firm banking side wall.The utility model is structurally reasonable, easy to operate, convenient to carry out fixed installation, height adjustment and horizontal adjustment to instrument of surveying and mapping.
Description
Technical field
The utility model relates to Surveying Engineering technical field of auxiliary equipment, specifically a kind of engineering is adjusted with instrument of surveying and mapping and is filled
It sets.
Background technique
Instrument of surveying and mapping is briefly exactly for instruments and dresses such as data sampling and processing, the outputs of mapping job design manufacture
It sets, includes to measure various orientations, survey required by work in planning and designing in engineering construction, construction and management stage
Away from, angle measurement, survey high, mapping and photogrammetric etc. instrument, such as theodolite, level, plane table, electromagnetic distance measurement
Instrument, total station, gyrotheodolite, laser surveying instrument etc..And surveying and drawing in fields of measurement, it is used primarily in and ground is surveyed
Measurement is drawn, and the ground of out-of-flatness is frequently encountered in mapping operations progress, and placing instrument of surveying and mapping can glance off, and influences mapping essence
Degree.
But existing regulating device, it is inconvenient to use, instrument of surveying and mapping can not easily be fixed, it can easily not
The height of instrument of surveying and mapping is adjusted, is carried out with adapting to the mapping worker of different heights using in the instrument of surveying and mapping to height after fixed
Carry out that horizontal adjustment is more troublesome, horizontal for adjustment and height instrument carries out changing angle when surveying and drawing, plotting board
Be inconvenient to the problem of being rotated, it is therefore desirable to which the novel regulating device of one kind carries out auxiliary mapping to instrument of surveying and mapping.
Summary of the invention
1, it to solve the problems, such as
It is inconvenient to use for existing regulating device, instrument of surveying and mapping can not easily be fixed, it can easily not
The height of instrument of surveying and mapping is adjusted, is carried out with adapting to the mapping worker of different heights using in the instrument of surveying and mapping to height after fixed
Carry out that horizontal adjustment is more troublesome, horizontal for adjustment and height instrument carries out changing angle when surveying and drawing, plotting board
Be inconvenient to the problem of being rotated, the purpose of this utility model is to provide a kind of engineering instrument of surveying and mapping regulating devices, with solution
Certainly the problems mentioned above in the background art.
2, technical solution
To achieve the above object, the utility model provides the following technical solutions:
A kind of engineering instrument of surveying and mapping regulating device, including workbench, the workbench upper surface is equipped with concave groove, described
Placement plate is equipped in concave groove, the placement plate upper surface is fixedly mounted air-bubble level and fixes device, under the placement plate
End face articulated telescopic bar, the hinged concave trench bottom in telescopic rod lower end surface, the outer noose spring of the telescopic rod, the spring two
End is fixedly connected with placement plate lower end surface and concave trench bottom, and the placement plate center side wall end face is fixedly connected with shaft one, described
Shaft one is rotatablely connected concave groove inner wall by bearing two, and for the shaft one through being connected in mounting groove, the shaft one is logical
Sealing bearing rotation connection mounting groove inner wall is crossed, one lower end of shaft is rotatablely connected mounting groove inner wall by bearing two, described
Gear one is fixedly mounted in shaft one, the gear one engages connection gear two, and the gear two is fixedly connected with shaft two, described
Shaft two is rotatablely connected mounting groove inner wall by bearing two, and the shaft two-way crosses sealing bearing rotation connection mounting groove inner wall,
And running through mounting groove inner wall, the shaft two is fixedly connected with rocking bar, and shaft, institute is fixedly mounted at the center of the workbench lower end surface
Shaft rotation connection height adjustment device is stated, the height adjustment device is fixedly connected with firm banking, the firm banking upper end
Face is fixedly connected with fixed column, and the first fixed plate is fixedly mounted in the firm banking side wall.
As a further solution of the present invention: the fixed device is symmetrically arranged with two, the fixed device includes
Second fixed plate, grip block and extruding spring, second fixed plate are fixedly connected with placement plate, and the extruding both ends of the spring face can
Dismounting the second fixed plate of connection and grip block, the grip block are fixed with preventing rubber on the end face at placement plate center
Layer.
The mounting groove end face is equipped with sealing cover as a further solution of the present invention, and the sealing cover passes through
Hinge connection workbench, the sealing cover is above-mentioned to be equipped with screw thread through hole, and the screw thread through hole internal screw thread connects tight fixed bolt
Three, the tapped through hole is located at right above gear two.
The height adjustment device includes slide bar and fixed column, the cunning as a further solution of the present invention,
Bar is upper end opening structure, and bearing one is fixedly mounted in the slide bar opening, and the shaft is rotatablely connected slide bar by bearing one,
The slide bar upper end is equipped with groove one, and the shaft lower end is set in groove one, and slide plate one is fixedly mounted in the shaft lower end surface,
The slide plate one is slidably connected one inner wall of groove, and the groove one side wall is set to threaded hole two, and the threaded hole two is threadedly coupled
Tight fixed bolt one, the fixed column are the hollow structure of upper end opening, and bearing one is fixedly mounted at the fixed column upper end opening,
Cavity is equipped in the fixed column, the slide bar is rotatablely connected fixed column by bearing one, and the lower end of the slider face is fixedly connected
Slide plate, the slide plate slides connect cavity, are equipped with support spring in the cavity, the support spring both ends of the surface are fixedly connected with sky
Bottom of chamber portion and slide plate, the fixed column side wall are equipped with threaded hole one, and one internal screw thread of threaded hole connects tight fixed bolt two.
L-type fixed link is fixedly mounted in the slide bar side wall as a further solution of the present invention, and the L-type is solid
Fixed pole is symmetrically arranged with two, and L-type fixed link upper surface is slidably connected sliding slot, and the sliding slot is fixedly mounted on workbench lower end
Face, the sliding slot are annular groove.
Fixed conehead is uniformly installed in the firm banking lower end surface as a further solution of the present invention,.
There are three first fixed plate is set as a further solution of the present invention, three the first fixed plates are in
Triangle-Profile is threadedly coupled fixed stay bolt in first fixed plate.
The fixed stay bolt upper end, which is fixedly mounted, as a further solution of the present invention, turns bar, described to twist
Rubber sleeve is set with outside lever.
Rubber antiskid set is cased with outside the rocking bar as a further solution of the present invention,.
3, beneficial effect
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model is structurally reasonable, easy to use, easy to operate, is carried out on level ground using firm banking
Support, fixed conehead increase the stability of firm banking, pass through the long spiral shell of fixation for the Triangle-Profile that firm banking side wall is installed
Support is fixed in bolt, with adapting to a variety of fields will definitely device be fixed, use height adjustment device carry out height adjustment, adjust
Length of the whole slide bar in fixed column, is fixed slide bar using tight fixed bolt two, instrument of surveying and mapping is placed in placement plate,
Instrument of surveying and mapping is fixed using fixed device, by rocking bar rotate gear two, placement plate is driven to carry out rotation adjustment, according to
Placement plate is adjusted level by air-bubble level, is fixed using tight fixed bolt three to gear two, is needed to rotate surveying instrument
When device, workbench is rotated using shaft, rotates to proper angle, is fixed using tight fixed bolt a pair of shaft.
(2) the fixation device of the utility model is convenient is fixed instrument of surveying and mapping, places instrument of surveying and mapping and shakes, root
According to the size for being placed on instrument of surveying and mapping in placement plate, the quantity that selection installation squeezes bullet consolidates instrument of surveying and mapping using grip block
It is fixed, the preventing rubber layer on grip block end face, scuffing when can prevent instrument of surveying and mapping from clamping.
(3) the mounting groove end face of the utility model is equipped with sealing cover, and sealing cover is sealed mounting groove, prevent impurity into
Enter, gear two is fixed in tight fixed bolt three, prevents gear two from rotating after horizontal adjustment.
(4) the L-type fixed link of the utility model, plays the role of reinforcing rib, is supported to workbench, improve device
Stability.
(5) the fixation conehead of the utility model makes device and ground fixation stronger.
(6) device is fixed in the fixation stay bolt of the Triangle-Profile of the utility model, and triangle is with more stabilization
Property, and with being adapted to a variety of fields will definitely device be fixed.
(7) it is cased with rubber antiskid set outside the rocking bar of the utility model, rocking bar is easy to use to carry out rotate gear two.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of engineering instrument of surveying and mapping regulating device.
Fig. 2 is a kind of structural schematic diagram of height adjustment device in engineering instrument of surveying and mapping regulating device.
Fig. 3 is the connection structure top view of firm banking and fixed plate in a kind of engineering instrument of surveying and mapping regulating device.
Fig. 4 is a kind of internal structure connection schematic diagram of mounting groove in engineering instrument of surveying and mapping regulating device.
Fig. 5 is a kind of internal structure scheme of installation of engineering instrument of surveying and mapping regulating device concave type groove.
Fig. 6 is a kind of top view of engineering instrument of surveying and mapping regulating device.
In figure: 1, workbench；2, fixed device；3, the second fixed plate；4, grip block；5, spring is squeezed；6, rocking bar；7, turn
Axis；8, L-type fixed link；9, height adjustment device；10, tight fixed bolt one；11, tight fixed bolt two；12, fixed stay bolt；13,
One fixed plate；14, firm banking；15, fixed conehead；16, slide bar；17, fixed column；18, cavity；19, support spring；20, sliding
Plate；21, threaded hole one；22, bearing one；23, groove one；24, threaded hole two；25, air-bubble level；26, concave groove；27, it puts
Set plate；28, shaft one；29, mounting groove；30, telescopic rod；31, spring；32, bearing is sealed；33, gear one；34, bearing two；
35, shaft two；36, gear two；37, tight fixed bolt three.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1~6, in the utility model embodiment, a kind of engineering instrument of surveying and mapping regulating device, including workbench
1,1 upper surface of workbench is equipped with concave groove 26, is equipped with placement plate 27,27 upper surface of placement plate in the concave groove 26
Air-bubble level 25 and fixed device 2 is fixedly mounted, the fixed device 2 is symmetrically arranged with two, and the fixed device 2 includes
Second fixed plate 3, grip block 4 and extruding spring 5, second fixed plate 3 are fixedly connected with placement plate 27, the extruding spring 5
Both ends of the surface the second fixed plate 3 of removable connection and grip block 4, the grip block 4 are solid on the end face at 27 center of placement plate
Surely it is equipped with preventing rubber layer, according to the size for being placed on instrument of surveying and mapping in placement plate 27, the quantity that selection installation squeezes spring 5 makes
Instrument of surveying and mapping is fixed with grip block 4, the 27 lower end surface articulated telescopic bar 30 of placement plate, 30 lower end of telescopic rod
Hinged 26 bottom of concave groove in face, the outer noose spring 31 of the telescopic rod 30,31 both ends of spring are fixedly connected under placement plate 27
26 bottom of end face and concave groove, the telescopic rod 30 are symmetrically arranged with multiple, and the 27 center side wall end face of placement plate is fixedly connected
Shaft 1, the shaft 1 are rotatablely connected 26 inner wall of concave groove by bearing 2 34, and the shaft 1, which runs through, to be connected to
In mounting groove 29.
29 end face of mounting groove is equipped with sealing cover, and the sealing cover is connected by hinge workbench 1, the shaft 1
It is rotatablely connected 29 inner wall of mounting groove by sealing bearing 32, one 28 lower end of shaft is rotatablely connected mounting groove by bearing 2 34
29 inner walls, gear 1 is fixedly mounted in the shaft 1, and the gear 1 engages connection gear 2 36, the gear two
36 are fixedly connected with shaft 2 35, and the shaft 2 35 is rotatablely connected 29 inner wall of mounting groove, the shaft 2 35 by bearing 2 34
It is rotatablely connected 29 inner wall of mounting groove by sealing bearing 32, and runs through 29 inner wall of mounting groove, the shaft 2 35, which is fixedly connected, shakes
Bar 6, the rocking bar 6 are cased with rubber antiskid set outside, and the sealing cover is above-mentioned to be equipped with screw thread through hole, spiral shell in the screw thread through hole
Line connects tight fixed bolt 3 37, and the tapped through hole is located at right above gear 2 36.
Shaft 7 is fixedly mounted at the 1 lower end surface center of workbench, the shaft 7 is rotatablely connected height adjustment device 9,
The height adjustment device 9 includes slide bar 16 and fixed column 17, and L-type fixed link 8, the L is fixedly mounted in 16 side wall of slide bar
Type fixed link 8 is symmetrically arranged with two, and 8 upper surface of L-type fixed link is slidably connected sliding slot, and the sliding slot is fixedly mounted on work
1 lower end surface of platform, the sliding slot are annular groove, and the slide bar 16 is upper end opening structure, the fixed peace of 16 opening of slide bar
Bearing 1 is filled, the shaft 7 is rotatablely connected slide bar 16 by bearing 1, and 16 upper end of slide bar is equipped with groove 1, institute
7 lower end of shaft is stated in groove 1, slide plate one is fixedly mounted in 7 lower end surface of shaft, and the slide plate one is slidably connected recessed
One 23 inner wall of slot, one 23 side wall of groove are set to threaded hole 2 24, and the threaded hole 2 24 is threadedly coupled tight fixed bolt 1,
The fixed column 17 is the hollow structure of upper end opening, and bearing 1 is fixedly mounted at 17 upper end opening of fixed column, described
Cavity 18 is set in fixed column 17, the slide bar 16 is rotatablely connected fixed column 17,16 lower end surface of slide bar by bearing 1
It is fixedly connected with slide plate 20, the slide plate 20 is slidably connected cavity 18, is equipped with support spring 19, the support in the cavity 18
19 both ends of the surface of spring are fixedly connected with 18 bottom of cavity and slide plate 20, and 17 side wall of fixed column is equipped with threaded hole 1, the spiral shell
One 21 internal screw thread of pit connects tight fixed bolt 2 11.
The height adjustment device 9 is fixedly connected with firm banking 14, and 14 upper surface of firm banking is fixedly connected with fixation
Fixed conehead 15 is uniformly installed in column 17,14 lower end surface of firm banking, and it is solid that 14 side wall of firm banking is fixedly mounted first
Fixed board 13, there are three first fixed plate 13 is set, three distributions triangular in shape of the first fixed plate 13, first fixed plate 13
The fixed stay bolt 12 of upper threaded connection.
The working principle of the utility model is: when using the use of the new type, on level ground using firm banking 14 into
Row support, fixed conehead 15 increase the stability of firm banking 14, the Triangle-Profile installed by 14 side wall of firm banking
Support is fixed in fixed stay bolt 12, adapts to a variety of field topographies, device is fixed, using height adjustment device 9 into
Row height adjusts, and adjusts length of the slide bar 16 in fixed column 17, is fixed, will be surveyed using 2 11 pairs of slide bars 16 of tight fixed bolt
It draws instrument to be placed in placement plate 27, instrument of surveying and mapping is fixed using fixed device 2, by 6 rotate gear 2 36 of rocking bar,
It drives placement plate 27 to carry out rotation adjustment, placement plate 27 is adjusted by level according to air-bubble level 25, uses tight fixed bolt
3 37 pairs of gears 2 36 are fixed, and when needing to rotate instrument of surveying and mapping, are rotated workbench 1 using shaft 7, and rotation is extremely
Proper angle is fixed using one 10 pairs of shafts 7 of tight fixed bolt.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (9)
1. a kind of engineering instrument of surveying and mapping regulating device, including workbench (1), which is characterized in that workbench (1) upper surface
Equipped with concave groove (26), placement plate (27) are equipped in the concave groove (26), gas is fixedly mounted in placement plate (27) upper surface
Soaked level (25) and fixed device (2), placement plate (27) the lower end surface articulated telescopic bar (30), under the telescopic rod (30)
End face hinged concave groove (26) bottom, the outer noose spring (31) of telescopic rod (30), spring (31) both ends are fixedly connected
Placement plate (27) lower end surface and concave groove (26) bottom, placement plate (27) the center side wall end face are fixedly connected with shaft one
(28), the shaft one (28) is rotatablely connected concave groove (26) inner wall by bearing two (34), and the shaft one (28) is through company
It being connected in mounting groove (29), the shaft one (28), which passes through, seals bearing (32) rotation connection mounting groove (29) inner wall, and described turn
Axis one (28) lower end is rotatablely connected mounting groove (29) inner wall by bearing two (34), and gear is fixedly mounted on the shaft one (28)
One (33), the gear one (33) engage connection gear two (36), and the gear two (36) is fixedly connected with shaft two (35), described
Shaft two (35) is rotatablely connected mounting groove (29) inner wall by bearing two (34), and the shaft two (35) passes through sealing bearing (32)
It is rotatablely connected mounting groove (29) inner wall, and runs through mounting groove (29) inner wall, the shaft two (35) is fixedly connected with rocking bar (6), institute
Fixed installation shaft (7) at workbench (1) lower end surface center is stated, the shaft (7) is rotatablely connected height adjustment device (9), institute
It states height adjustment device (9) to be fixedly connected firm banking (14), firm banking (14) upper surface is fixedly connected with fixed column
(17), the first fixed plate (13) are fixedly mounted in firm banking (14) side wall.
2. a kind of engineering instrument of surveying and mapping regulating device according to claim 1, which is characterized in that the fixed device
(2) two are symmetrically arranged with, the fixed device (2) includes the second fixed plate (3), grip block (4) and squeezes spring (5), described
Second fixed plate (3) is fixedly connected placement plate (27), extruding spring (5) both ends of the surface second fixed plate of removable connection (3)
With grip block (4), the grip block (4) is fixed with preventing rubber layer on the end face at placement plate (27) center.
3. a kind of engineering instrument of surveying and mapping regulating device according to claim 1, which is characterized in that the mounting groove (29)
End face is equipped with sealing cover, and the sealing cover is connected by hinge workbench (1), and the sealing cover is above-mentioned to be equipped with screw thread through hole,
The screw thread through hole internal screw thread connects tight fixed bolt three (37), and the tapped through hole is located at right above gear two (36).
4. a kind of engineering instrument of surveying and mapping regulating device according to claim 1, which is characterized in that the height adjustment dress
Setting (9) includes slide bar (16) and fixed column (17), and the slide bar (16) is upper end opening structure, and slide bar (16) opening is solid
Dingan County fills bearing one (22), and by bearing one (22) rotation connection slide bar (16), slide bar (16) upper end is set the shaft (7)
Fluted one (23), shaft (7) lower end are set in groove one (23), and slide plate one is fixedly mounted in shaft (7) lower end surface,
The slide plate one is slidably connected groove one (23) inner wall, and groove one (23) side wall is set to threaded hole two (24), the screw thread
Hole two (24) is threadedly coupled tight fixed bolt one (10), and the fixed column (17) is the hollow structure of upper end opening, the fixed column
(17) bearing one (22) are fixedly mounted at upper end opening, are equipped with cavity (18) in the fixed column (17), the slide bar (16) is logical
Bearing one (22) rotation connection fixed column (17) is crossed, slide bar (16) lower end surface is fixedly connected with slide plate (20), the slide plate
(20) be slidably connected cavity (18), is equipped with support spring (19) in the cavity (18), and support spring (19) both ends of the surface are solid
Surely cavity (18) bottom and slide plate (20) are connected, fixed column (17) side wall is equipped with threaded hole one (21), the threaded hole one
(21) internal screw thread connection tight fixed bolt two (11).
5. a kind of engineering instrument of surveying and mapping regulating device according to claim 4, which is characterized in that slide bar (16) side
L-type fixed link (8) are fixedly mounted in wall, and the L-type fixed link (8) is symmetrically arranged with two, and L-type fixed link (8) upper surface is sliding
Dynamic connection sliding slot, the sliding slot are fixedly mounted on workbench (1) lower end surface, and the sliding slot is annular groove.
6. a kind of engineering instrument of surveying and mapping regulating device according to claim 1, which is characterized in that the firm banking
(14) fixed conehead (15) are uniformly installed in lower end surface.
7. a kind of engineering instrument of surveying and mapping regulating device according to claim 1, which is characterized in that first fixed plate
(13) there are three setting, three the first fixed plate (13) distributions triangular in shape are threadedly coupled on first fixed plate (13) and fix
Stay bolt (12).
8. a kind of engineering instrument of surveying and mapping regulating device according to claim 7, which is characterized in that the fixed stay bolt
(12) upper end, which is fixedly mounted, turns bar, and described turn is set with rubber sleeve outside bar.
9. a kind of engineering instrument of surveying and mapping regulating device according to claim 1, which is characterized in that the rocking bar (6) is outside
It is cased with rubber antiskid set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820858554.9U CN209326642U (en) | 2018-06-04 | 2018-06-04 | A kind of engineering instrument of surveying and mapping regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820858554.9U CN209326642U (en) | 2018-06-04 | 2018-06-04 | A kind of engineering instrument of surveying and mapping regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209326642U true CN209326642U (en) | 2019-08-30 |
Family
ID=67706049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820858554.9U Expired - Fee Related CN209326642U (en) | 2018-06-04 | 2018-06-04 | A kind of engineering instrument of surveying and mapping regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209326642U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043473A (en) * | 2019-12-24 | 2020-04-21 | 华北水利水电大学 | Earth surveying instrument workstation elevating gear |
| CN112303405A (en) * | 2020-10-29 | 2021-02-02 | 辽宁工程技术大学 | Surveying instrument with height convenient to adjust and operation method |
-
2018
- 2018-06-04 CN CN201820858554.9U patent/CN209326642U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043473A (en) * | 2019-12-24 | 2020-04-21 | 华北水利水电大学 | Earth surveying instrument workstation elevating gear |
| CN112303405A (en) * | 2020-10-29 | 2021-02-02 | 辽宁工程技术大学 | Surveying instrument with height convenient to adjust and operation method |
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Granted publication date: 20190830 Termination date: 20210604 |