CN111081130A - Leveling rod reading simulator - Google Patents
Leveling rod reading simulator Download PDFInfo
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- CN111081130A CN111081130A CN201911355771.1A CN201911355771A CN111081130A CN 111081130 A CN111081130 A CN 111081130A CN 201911355771 A CN201911355771 A CN 201911355771A CN 111081130 A CN111081130 A CN 111081130A
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- leveling rod
- groove
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
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Abstract
The invention relates to a leveling rod reading simulator, which belongs to the field of teaching tools, and the teaching model comprises a leveling rod, a cross wire disc and a base, wherein the leveling rod is detachably connected on the base, the cross wire disc is fixedly connected on the upper part of the base and plays a role in observing reading, and the teaching model has the beneficial effects that: the invention has the advantages of convenient use, convenient carrying, low cost, simple manufacture and mass production. The teaching instrument can be used for real object explanation in a classroom, so that students can better know the reading method and skill of the level, the teaching instrument can be recycled for many times, waste is avoided, and the problem of reading of the classroom real object explanation level is solved.
Description
Technical Field
The invention belongs to the field of teaching tools, and particularly relates to a leveling rod reading simulator in a measuring process.
Background
In the measurement of engineering measurement elevation, a leveling instrument for placing a ruler pad and a leveling rod according to the positions of two points is required for measurement. Firstly, determining the position of a point to be measured, placing a ruler pad, erecting a ruler, adjusting a level and measuring the reading. In the process, the difficulty is not only in adjusting the level gauge and the vertical ruler, but also in understanding and mastering the reading rule and principle of the surface of the leveling ruler. The leveling rod has the advantages that the object is large and is not easy to carry back and forth, so that the leveling rod is not suitable for taking the object for teaching in a classroom, difficulty is brought to teaching to a certain extent, and teaching contents are difficult to meet.
Disclosure of Invention
In order to solve the technical problem, the invention provides a leveling rod reading simulator. The technical problem is solved by adopting the following technical scheme: a leveling rod reading simulator comprises a leveling rod, a base and a cross wire disc, wherein the leveling rod comprises a rectangular rod body and sliding edges longitudinally distributed along the rod body, a central groove is formed in the rectangular base and is longitudinally communicated, a vertical plate block is transversely arranged, the central groove comprises a rectangular groove and a sliding groove which are longitudinally formed along the base, the sliding groove is a groove matched with the sliding edges, the groove is a groove formed by transversely outwards forming the inner side surface of the vertical plate block, the sliding edges are embedded into the sliding groove, so that the leveling rod can longitudinally move in the sliding groove and limit the leveling rod, and the cross wire disc is installed on the upper edge of the vertical plate block.
Furthermore, the sliding edge is formed by transversely inclining and outwards transiting the top surface of the leveling rod towards the bottom surface, the cross section of the leveling rod is narrow at the top and wide at the bottom, the sliding groove is formed by transversely inclining and outwards forming the top surface of the vertical plate towards the bottom surface, and the groove cross section of the central groove with the narrow at the top and the wide at the bottom is formed.
Further, the radial section of the leveling rod is an isosceles T-shaped section, and the groove section of the central groove is an isosceles T-shaped section.
Furthermore, the sliding edge is formed by transversely inclining the top surface and the bottom surface of the leveling rod towards the middle and outwards transiting the top surface and the bottom surface of the leveling rod, the cross section of the leveling rod is narrow from top to bottom and wide in the middle, the sliding groove is formed by transversely inclining the top surface and the bottom surface of the vertical plate towards the middle and outwards forming a groove cross section of a central groove which is narrow from top to bottom and wide in the middle, and the upper surface and the lower surface of the leveling rod are provided with scales.
Further, the leveling rod section is a hexagonal section formed by combining two isosceles T-shapes of vertical arrangement with lower bases butted, and the groove section of the central groove is a hexagonal section formed by combining two isosceles T-shapes of vertical arrangement with lower bases butted.
The second leveling rod reading simulator comprises a leveling rod, a base and a cross wire disc, wherein the leveling rod comprises a rectangular rod body, a central groove is arranged on the rectangular base, the groove is longitudinally communicated, a vertical plate is arranged in the transverse direction, the rectangular ruler body is embedded into the central groove, the outer side surface of the rectangular ruler body is in contact with the inner side surface of the vertical plate and serves as a sliding surface, so that the leveling ruler can move longitudinally in the central groove, and the side surfaces of two opposite vertical plate blocks are provided with screw holes which transversely penetrate through, the width of each screw hole is more than or equal to the diameter of a screw rod and less than the diameter of the widest part of a screw cap, the screw holes are used for screwing in screws to adjust the transverse relative distance between the two screws, the clamping force of the two screws on the rectangular ruler body in the transverse direction is increased or decreased, the leveling ruler is limited in the central groove, and the cross wire disc is installed on the upper edge of the vertical plate.
Furthermore, the upper surface and the lower surface of the leveling rod are provided with scales.
The third leveling rod reading simulator comprises a leveling rod, a base and a cross wire disc, wherein the leveling rod comprises a rectangular rod body, a central groove is formed in the rectangular base and is longitudinally communicated, vertical plates are arranged in the transverse direction, the rectangular rod body is embedded into the central groove, the outer side face of the rectangular rod body is in contact with the inner side face of the vertical plate and serves as a sliding face, so that the leveling rod can longitudinally move in the central groove, the side face of one vertical plate is provided with a screw hole which is transversely penetrated, the width of the screw hole is larger than or equal to the diameter of a screw rod and smaller than the diameter of the widest position of a screw cap, the screw hole is used for screwing in the screw to adjust the extrusion force between the rectangular rod body and the inner side face of the vertical plate, the leveling rod is limited in the central groove through the screw, and the extrusion force is that the end face of the screw and the inner side face of the other vertical plate are extruded towards the rectangular rod body positioned between the screw rod body, the cross wire disc is arranged on the upper edge of the vertical plate.
Furthermore, the upper surface and the lower surface of the leveling rod are provided with scales.
The invention has the advantages and positive effects that: the invention is convenient to use and carry, can be conveniently displayed in a classroom, can be recycled for many times, and solves the problem of explaining the reading of the leveling rod in the classroom.
Drawings
FIG. 1 is a perspective assembly view of style one;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a top view of a level bar of style one;
FIG. 6 is a top view of a base of style one;
FIG. 7 is a front view of the base of style one;
FIG. 8 is a front view of a level bar of style one;
FIG. 9 is a top view of a cross-hair disk of style one;
FIG. 10 is a perspective assembly view (level bar front) of style two;
FIG. 11 is a perspective assembly view (reverse side of leveling rod) of style two;
FIG. 12 is a front view of FIG. 10 or FIG. 11;
FIG. 13 is a left side view of FIG. 10 or FIG. 11;
FIG. 14 is a top view of FIG. 10;
FIG. 15 is a top view of FIG. 11;
FIG. 16 is a top view of a level of style two (level front);
FIG. 17 is a top view of the level of style two (level bar reverse);
FIG. 18 is a top view of the base of version two;
FIG. 19 is a front view of the base of style two;
FIG. 20 is a front view of a level bar of style two;
FIG. 21 is a top view of a cross-hair disk of style two;
FIG. 22 is a perspective assembly view (level bar front) of style three;
FIG. 23 is a perspective assembly view of style three (reverse side of leveling rod);
FIG. 24 is a front view of FIG. 22 or FIG. 23;
FIG. 25 is a left side view of FIG. 22 or 23;
FIG. 26 is a top view of FIG. 22;
FIG. 27 is a top view of FIG. 23;
FIG. 28 is a top view of a version three of the level (level front);
FIG. 29 is a top view of a version three of the level (level bar reverse);
FIG. 30 is a top view of a base of style three;
FIG. 31 is a front view of the base of style three;
FIG. 32 is a front view of a style three leveling rod;
FIG. 33 is a schematic view of a screw of type three;
figure 34 is a top view of a cross-hair disc of style three.
Description of reference numerals: 1-leveling rod, 2-base, 3-cross wire disc, 4-graduation line, 5-chute and 6-screw.
Detailed Description
The present invention will be described in more detail below with reference to the accompanying drawings by way of specific embodiments. The following examples are illustrative only, not limiting, and are not intended to limit the scope of the invention. The present invention is described below by taking two patterns as examples. The first type is a single-sided leveling rod type, the second type is a double-sided leveling rod clamping groove type, and the third type is a double-sided leveling rod bolt type. The three-dimensional assembly structure is respectively shown in fig. 1, fig. 2 and fig. 3. A leveling rod reading simulator, comprising: a leveling rod, a cross wire disc and a base; the leveling rod and the real object have the same characteristics, and the rod surface has partial scales; the cross wire disc is connected to the base and used for simulating a level objective, the base is used for bearing the leveling rod and the cross wire disc, and the clamping groove part is arranged on the cross wire disc and is convenient for the leveling rod to slide and be detached.
In a preferred form, the level comprises a body and graduation marks; the two sides of the main body are wedge-shaped (with front and back sides) for being clamped into the base; the scale marks are printed or engraved on the surface (front surface) of the ruler by a machine.
In another preferred mode, the leveling rod comprises a main body and scale marks, wherein the two sides of the main body are wedge-shaped (the front side and the back side do not exist), and the scale marks are printed on the two sides (a red rod and a black rod).
More preferably, the leveling rod comprises a main body, scale marks and a fixing screw, wherein the main body is a normal cuboid, and the scale marks are printed on two surfaces (a red ruler and a black ruler); the fixed screw is used for fixing the ruler and is connected with the base, and one side of the distribution is arranged.
The leveling rod reading simulator comprises a leveling rod 1, a base 2 and a cross wire disc 3, wherein the leveling rod 1 comprises a rectangular rod body and sliding edges longitudinally distributed along the rod body, a central groove is formed in the rectangular base 2 and is longitudinally communicated, a vertical plate block is transversely arranged, the central groove comprises a rectangular groove and a sliding groove which are longitudinally formed along the base 2, the sliding groove is a groove matched with the sliding edge, the sliding groove is a groove formed by the inner side surface of the vertical plate block towards the transverse outer side, the sliding edge is embedded into the sliding groove, so that the leveling rod 1 can longitudinally move in the sliding groove and limit the leveling rod 1, and the cross wire disc 3 is arranged on the upper edge of the vertical plate block.
Furthermore, the sliding edge is formed by transversely inclining and outwards transiting the top surface of the leveling rod 1 to the bottom surface direction, the cross section of the leveling rod 1 is narrow at the top and wide at the bottom, the sliding groove is formed by transversely inclining and outwards slotting the top surface of the vertical plate to the bottom surface direction, and the groove cross section of the central groove with the narrow at the top and the wide at the bottom is formed.
Further, the radial section of the leveling rod 1 is an isosceles T-shaped section, and the groove section of the central groove is an isosceles T-shaped section.
Further, the sliding edge is formed by the top surface and the bottom surface of the leveling rod 1 which are inclined towards the middle transversely and transition outwards, the cross section of the leveling rod 1 is narrow in the upper part and the lower part and wide in the middle, the sliding groove is formed by the top surface and the bottom surface of the vertical plate which are inclined towards the middle transversely and outwards and is provided with a groove cross section of a central groove which is narrow in the upper part and the lower part and wide in the middle, and the upper surface and the lower surface of the leveling rod 1 are provided with scales.
Further, the cross section of the leveling rod 1 is a hexagonal cross section formed by combining two vertically arranged isosceles T-shapes whose lower bases are butted, and the groove cross section of the central groove is a hexagonal cross section formed by combining two vertically arranged isosceles T-shapes whose lower bases are butted.
A leveling rod reading simulator comprises a leveling rod 1, a base 2 and a cross wire disc 3, wherein the leveling rod 1 comprises a rectangular rod body, a central groove is arranged on the rectangular base 2, the groove is longitudinally communicated, a vertical plate is arranged in the transverse direction, the rectangular ruler body is embedded into the central groove, the outer side surface of the rectangular ruler body is contacted with the inner side surface of the vertical plate and is used as a sliding surface, so that the leveling rod 1 can move longitudinally in the central groove, and the side surfaces of two opposite vertical plate blocks are provided with screw holes which transversely penetrate through, the width of each screw hole is more than or equal to the diameter of a screw rod and less than the diameter of the widest part of a screw cap, the screw holes are used for screwing in screws to adjust the transverse relative distance between the two screws, the clamping force of the two screws on the rectangular ruler body in the transverse direction is increased or decreased, the leveling ruler 1 is limited in the central groove, and the cross wire disc 3 is installed on the upper edge of the vertical plate.
Furthermore, the upper surface and the lower surface of the leveling rod 1 are provided with scales.
A leveling rod reading simulator comprises a leveling rod 1, a base 2 and a cross wire disc 3, wherein the leveling rod 1 comprises a rectangular rod body, a central groove is formed in the rectangular base 2 and is longitudinally communicated, a vertical plate block is arranged in the transverse direction, the rectangular rod body is embedded into the central groove, the outer side surface of the rectangular rod body is in contact with the inner side surface of the vertical plate block and serves as a sliding surface, the leveling rod 1 can move longitudinally in the central groove, two opposite vertical plate blocks are arranged, a screw hole transversely penetrates through the side surface of one vertical plate block, the width of the screw hole is larger than or equal to the diameter of a screw rod and smaller than the diameter of the widest part of a screw cap, the screw hole is used for screwing in the screw to adjust the extrusion force of the inner side surfaces of the rectangular rod body and the vertical plate block, the leveling rod 1 is limited in the central groove through the screw, and the extrusion is realized by extruding the end surface of the screw and the inner side surface of the other vertical plate block to the, the cross wire disc 3 is arranged on the upper edge of the vertical plate.
Furthermore, the upper surface and the lower surface of the leveling rod 1 are provided with scales.
Example 1
As shown in figure 1, the first model consists of a ruler body 1, a base 2, a cross wire 3 and the like. Wherein the ruler body 1 consists of a main body and scale marks 4, and two side wings are polished into a wedge shape to be conveniently clamped in the sliding groove 5. The ruler body 1 is connected with the base 2 through the wedge-shaped sliding groove, and the ruler body can be fixed on the base 2 due to the fact that friction force exists and the ruler body is light, and therefore slipping in the explaining process is avoided.
As shown in fig. 7, a leveling rod of the first type has a length of 300mm, a width of 80mm and a thickness of 10mm, wherein the surface of the leveling rod has a width of 60mm, the leveling rod is made of wood, is made of the same material as a real wood pile and is convenient to mark, and the leveling rod strips can be replaced by a plurality of strips. The diameter of the cross wire disc is 100mm, the material is a transparent hard thin plastic plate, the number is convenient to observe, the cross wire disc is fixedly connected with the base, and the cross wire disc does not need to be detached in the using process; the base is 100mm long, and wide 100mm thickness is 20mm, and the material does not have special requirement, and the spout (need not polish, increase frictional force) exists in comparatively extensive (suggestion uses wooden material) inside both sides (be used for linking to each other with the levelling rod). The whole structure is easy to operate, the degree can be observed only by inserting the leveling rod into the base, and the leveling rod can slide back and forth to change the number. Since the materials are mostly taken from wood materials, the material is lighter and more portable.
Example 2
As shown in figure 2, the second model also comprises the ruler body 1, the base 2, the cross wire 3 and the like. Different from the first type, the two sides of the leveling rod can be switched to the red and black rod, and the sliding groove of the base is changed. As shown in fig. 11, the leveling rod has the same size as the first model and is made of wood, and several leveling rods can be replaced. The cross-hair disc is the same as the first pattern. The base sliding groove is changed, the shape of the sliding groove is the same as that of the leveling rod, and the rest of the sliding groove is the same as that of the first type. Compared with the first scheme, the improved part of the scheme is that double-sided switching can be performed, more detailed explanation can be performed, and the using method is the same as the first scheme.
Example 3
As shown in fig. 3, the third type has the same composition as the first two types, but the difference lies in that the third type is fixed and adjusted by screws, so that the leveling rod has the advantages of higher damage resistance than the first two types, no reduction of the surface smooth friction force caused by long-time use and no incapability of use, and the defect is that the operation is not simple as the first two types.
As shown in FIG. 15, the leveling rod is composed of a long wooden board (which can be made into several boards) with the length of 300mm, the width of 80mm and the height of 10 mm. The cross-shaped disc adopts the two schemes. The base is provided with no sliding chute, the length is 140mm, the width is 100mm, the height is 20mm, one side is provided with a screw, and the size is that the diameter of the round flat head is 20mm, and the thickness is 10 mm; the screw rod is 30mm long and 10mm in diameter. The mode can also be switched between two sides, the use method is characterized in that the leveling rod is inserted into the clamping groove of the base and is screwed down by screws for fixing, and the screws are unscrewed for replacement when the leveling rod is replaced.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (9)
1. A leveling rod reading simulator is characterized by comprising a leveling rod (1), a base (2) and a cross wire disc (3), wherein the leveling rod (1) comprises a rectangular rod body and sliding edges longitudinally distributed along the rod body, a central groove is formed in the rectangular base (2) and longitudinally communicated with the groove, a vertical plate is transversely arranged on the groove, the central groove comprises a rectangular groove and a sliding groove which are longitudinally formed along the base (2), the sliding groove is a groove matched with the sliding edges, the groove is a groove formed by the inner side surface of a vertical plate and transversely outwards formed, the sliding edges are embedded into the sliding groove, the leveling rod (1) can longitudinally move in the sliding groove and is limited by the leveling rod (1), and the cross wire disc (3) is mounted on the upper edge of the vertical plate.
2. The level bar reading simulator of claim 1, wherein: the sliding edge is formed by transversely inclining the top surface of the leveling rod (1) to the bottom surface direction and outwards transiting, the section of the leveling rod (1) is narrow at the top and wide at the bottom, the sliding groove is formed by transversely inclining the top surface of the vertical plate to the bottom surface direction and outwards forming a groove section of a central groove with the narrow at the top and the wide at the bottom.
3. The level bar reading simulator of claim 2, wherein: the radial section of the leveling rod (1) is an isosceles T-shaped section, and the groove section of the central groove is an isosceles T-shaped section.
4. The level bar reading simulator of claim 1, wherein: the sliding edge is formed by the top surface and the bottom surface of the leveling rod (1) in a manner of transversely inclining towards the middle and outwards transiting, the section of the leveling rod (1) is narrow from top to bottom and wide in the middle, the sliding groove is formed by the top surface and the bottom surface of the vertical plate in a manner of transversely inclining towards the middle and outwards forming a groove section of a central groove which is narrow from top to bottom and wide in the middle, and the upper surface and the lower surface of the leveling rod (1) are provided with scales.
5. The level bar reading simulator of claim 4, wherein: the cross section of the leveling rod (1) is a hexagonal cross section formed by combining two vertically arranged isosceles T-shaped bodies with butted lower bottom edges, and the groove cross section of the central groove is a hexagonal cross section formed by combining two vertically arranged isosceles T-shaped bodies with butted lower bottom edges.
6. A leveling rod reading simulator is characterized by comprising a leveling rod (1), a base (2) and a cross wire disc (3), wherein the leveling rod (1) comprises a rectangular rod body, a central groove is formed in the rectangular base (2) and is longitudinally communicated, a vertical plate is transversely arranged, the rectangular rod body is embedded into the central groove, the outer side face of the rectangular rod body is in contact with the inner side face of the vertical plate and serves as a sliding face, the leveling rod (1) can longitudinally move in the central groove, the side faces of two opposite vertical plates are provided with transversely-communicated screw holes, the width of each screw hole is larger than or equal to the diameter of a screw rod and smaller than the diameter of the widest position of a screw cap, the screw holes are used for screwing in the screws to adjust the transverse relative distance between the two screws, the clamping force of the two screws on the rectangular rod body is increased and decreased, and the leveling rod (1) is limited in the central groove, the cross wire disc (3) is arranged on the upper edge of the vertical plate.
7. The level bar reading simulator of claim 6, wherein: the upper surface and the lower surface of the leveling rod (1) are provided with scales.
8. A leveling rod reading simulator is characterized by comprising a leveling rod (1), a base (2) and a cross wire disc (3), wherein the leveling rod (1) comprises a rectangular rod body, a central groove is formed in the rectangular base (2) and is longitudinally communicated, a vertical plate block is transversely arranged, the rectangular rod body is embedded into the central groove, the outer side face of the rectangular rod body is in contact with the inner side face of the vertical plate block and serves as a sliding face, the leveling rod (1) can longitudinally move in the central groove, two opposite vertical plate blocks are arranged, the side face of one vertical plate block is provided with a transversely penetrating screw hole, the width of the screw hole is larger than or equal to the diameter of a screw rod and smaller than the diameter of the widest part of a screw cap, the screw hole is used for screwing in the screw rod to adjust the extrusion force of the inner side faces of the rectangular rod body and the vertical plate block, and the leveling rod (1) is limited in the central groove through the screw rod, and the extrusion is that the end surface of the screw and the inner side surface of the other vertical plate block are extruded towards the rectangular ruler body positioned between the end surface of the screw and the inner side surface of the other vertical plate block, and the cross wire disc (3) is arranged on the upper edge of the vertical plate block.
9. The level bar reading simulator of claim 8, wherein: the upper surface and the lower surface of the leveling rod (1) are provided with scales.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355771.1A CN111081130A (en) | 2019-12-25 | 2019-12-25 | Leveling rod reading simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355771.1A CN111081130A (en) | 2019-12-25 | 2019-12-25 | Leveling rod reading simulator |
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| Publication Number | Publication Date |
|---|---|
| CN111081130A true CN111081130A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911355771.1A Pending CN111081130A (en) | 2019-12-25 | 2019-12-25 | Leveling rod reading simulator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202133396U (en) * | 2011-07-14 | 2012-02-01 | 何斌 | Levelling instrument |
| CN103612527A (en) * | 2013-12-22 | 2014-03-05 | 张若玮 | Special-purpose multifunctional ruler for teaching |
| CN104501774A (en) * | 2014-12-24 | 2015-04-08 | 吕皓 | Level gauge with distance measuring function |
| CN204630571U (en) * | 2015-06-02 | 2015-09-09 | 鸡西大学 | A kind of indoor instruction levelling pole |
| CN206504729U (en) * | 2017-02-22 | 2017-09-19 | 辽宁省有色地质局一0三队 | A kind of teaching object staff base and the matched levelling rod used |
| CN207395622U (en) * | 2017-11-02 | 2018-05-22 | 西安科技大学 | It is a kind of to determine front-and rear-view away from equal device in the measurement of the level |
| CN208313300U (en) * | 2018-05-11 | 2019-01-01 | 浙江鼎测地理信息技术有限公司 | A kind of level-and-rod equipment |
-
2019
- 2019-12-25 CN CN201911355771.1A patent/CN111081130A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202133396U (en) * | 2011-07-14 | 2012-02-01 | 何斌 | Levelling instrument |
| CN103612527A (en) * | 2013-12-22 | 2014-03-05 | 张若玮 | Special-purpose multifunctional ruler for teaching |
| CN104501774A (en) * | 2014-12-24 | 2015-04-08 | 吕皓 | Level gauge with distance measuring function |
| CN204630571U (en) * | 2015-06-02 | 2015-09-09 | 鸡西大学 | A kind of indoor instruction levelling pole |
| CN206504729U (en) * | 2017-02-22 | 2017-09-19 | 辽宁省有色地质局一0三队 | A kind of teaching object staff base and the matched levelling rod used |
| CN207395622U (en) * | 2017-11-02 | 2018-05-22 | 西安科技大学 | It is a kind of to determine front-and rear-view away from equal device in the measurement of the level |
| CN208313300U (en) * | 2018-05-11 | 2019-01-01 | 浙江鼎测地理信息技术有限公司 | A kind of level-and-rod equipment |
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Application publication date: 20200428 |