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35 results about "Level staff" patented technology

A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum. It cannot be used without a leveling instrument.

Stable leveling rod support convenient to adjust

The invention relates to the technical field of leveling observation, in particular to a stable and convenient-to-adjust leveling rod support which comprises a mounting unit, and the mounting unit comprises a mounting plate, mounting grooves formed in the two ends of the mounting plate and supporting assemblies arranged in the mounting grooves; and the clamping unit comprises an arc-shaped ring groove formed in the middle of the mounting plate and a clamping assembly rotationally arranged in the arc-shaped ring groove. According to the stable leveling rod support convenient to adjust, the clamping assembly rotates by 360 degrees in the mounting plate due to gravity, it is ensured that the clamping assembly cannot incline due to inclination of the mounting plate, after the mounting plate is erected, the clamping assembly is fixed through the fixing assembly, it is ensured that a leveling rod is kept in a vertical state after being mounted and is not affected by the mounting plate, and the leveling rod support is stable and convenient to adjust. Inclination of the mounting plate has no influence on the clamping assembly, and height adjustment of the mounting plate is further facilitated.
Owner:GUIZHOU WUJIANG HYDROPOWER DEV +1

Leveling rod monitoring adaptation device

The leveling rod monitoring adaptation device comprises a connecting piece and an adaptation piece. The connecting piece is mounted at the bottom of the leveling rod. The adapter is detachably connected to the lower portion of the connecting piece, and the shape of the adapter is set to be capable of being inserted into the settlement monitoring hole to reach the position making contact with the settlement monitoring point. The leveling rod monitoring adaptive device is used for assisting settlement monitoring of the leveling rod, the application range of settlement monitoring of the leveling rod is widened, the cost is low, and the structure is simple.
Owner:SHANGHAI PUGONG TESTING TECH CO LTD

Leveling rod convenient to carry

The utility model discloses a portable leveling rod which comprises a storage box, a box cover, an adjustable leveling rod assembly, a portable moving assembly and a vertical plate, the adjustable leveling rod assembly comprises a rotating motor, a transmission rotating plate, a transmission gear, a connecting seat, a driven gear, a graduated scale, a rotating rod and a driven rotating plate, the portable moving assembly comprises a base, rolling wheels, straps and connecting buckles. The utility model belongs to the technical field of leveling rods, and the transmission rotating plate can be driven to rotate by starting the rotating motor, so that the two groups of graduated scales can be conveniently rotated and expanded to adjust the specification of the leveling rod under the action of limited rotation of the rotating rod; the device stored in the storage box can be moved in a labor-saving manner by rotating the rolling wheels, and the device can be conveniently carried by carrying the straps.
Owner:GUANGDONG CHENGXINDA SURVEY CONSULTING CO LTD

A ground leveling rod fixing tool

The utility model discloses a leveling rod fixed ground contact stand, belongs to surveying and mapping equipment technical field. Including the positioning vertical pole, the sliding mounting plate of being sleeved in the positioning vertical pole outer wall and can slide up and down, the leveling rod fixed frame of being located in the sliding mounting plate side wall, the leveling rod body of being installed on the leveling rod fixed frame, sliding mounting plate is as the basic support structure, and the sliding mounting plate on the sliding mounting plate slides up and down along the positioning vertical pole, can be used for adjusting the height of leveling rod, simultaneously, the relative rotation between the sliding inner plate and the sliding outer plate of sliding mounting plate can be used for adjusting the angle of leveling rod, in the process of adjusting, can be through the angle mark scale that the tip of observation indication arrow points to, accurate control rotation angle, ensure that the leveling rod body can accurately aim at the measurement direction, improve the accuracy of measurement, especially in some angle has specific requirement's measurement operation, and this structure is especially practical.
Owner:SEISMOLOGICAL BUREAU OF SHAANXI PROVINCE

Device for hanging connecting piece of leveling rod upside down

The utility model discloses a device for upside down hanging a connecting piece of a leveling rod, which comprises a vault sinking measuring point measuring pile, a steel plate, a strong magnet and a leveling rod body, the steel plate is fixed on the surface of the vault sinking measuring point measuring pile, a connecting seat is fixed at the bottom of the strong magnet, the inner wall of the connecting seat is connected with a movable ball rod in a sliding manner, and the movable ball rod is fixed on the steel plate. A connecting rod is fixed to the bottom of the movable ball rod, a limiting structure is installed on the surface of the movable ball rod, a guide shell is fixed to the bottom of the connecting rod, a fixed base is arranged in the guide shell, an extension plate is fixed to the bottom of the fixed base, and the leveling rod body is located on the inner side of the extension plate. Two fastening bolts penetrate through the surface of the extending plate in a threaded mode, and a clamping plate is fixed to one end of each fastening bolt. According to the utility model, measurement errors caused by the fact that the hanging ruler cannot guarantee the vertical and horizontal state and the connection position is loosened can be avoided, the accuracy of monitoring data can be guaranteed, and the efficiency of monitoring work can be greatly improved.
Owner:中交一公局绿建(厦门)科技有限公司

Leveling device, leveling rod and displacement monitoring system

The utility model discloses a benchmark device, a leveling rod and a displacement monitoring system.The displacement monitoring system at least comprises a level gauge, the leveling rod and the benchmark device, the leveling rod comprises a rod body and a first magnetic attraction part, the lower portion of the rod body is provided with a first matching feature, and the first magnetic attraction part is arranged adjacent to the first matching feature; the benchmark device comprises a second matching feature and a second magnetic attraction piece, the second matching feature is matched with the first matching feature, and the second magnetic attraction piece is arranged adjacent to the second matching feature; and when the leveling rod is arranged on the leveling point device in a matching manner through the first matching feature and the second matching feature, the first magnetic attraction piece and the second magnetic attraction piece are attracted. According to the technical scheme, the monitoring efficiency can be improved, and the monitoring cost can be reduced.
Owner:SHANGHAI QINGYOU MUNICIPAL ENGINEERING CO LTD

Leveling device based on GNSS (Global Navigation Satellite System)

The utility model provides a leveling device based on a GNSS (Global Navigation Satellite System), belonging to the technical field of leveling. The device comprises a mounting seat, a fixing seat, a level gauge, a leveling rod and positioning assemblies, the level gauge and the leveling rod are arranged on the fixing seat at intervals, the positioning assemblies are arranged on the fixing seat and are in signal connection with an observation station, and the fixing assemblies are arranged on the two opposite sides of the bottom of the fixing seat and comprise fixing blocks and push-pull rods. The fixing block is arranged at the bottom of the fixing base, a sliding hole in the horizontal direction is formed in the fixing block, the push-pull rods penetrate through the sliding hole, the two push-pull rods abut against the two sides of the mounting base respectively, and the sliding holes of the two fixing assemblies are oppositely formed. By adopting the leveling device based on the GNSS provided by the embodiment of the utility model, the problems of low operation portability and low measurement efficiency in the prior art can be solved.
Owner:SANYA SCI & EDUCATION INNOVATION PARK WUHAN UNIV OF TECH

Measuring auxiliary lamp for leveling rod

The utility model discloses an auxiliary measuring lamp for a leveling rod, which belongs to the technical field of leveling measurement and comprises a transparent shell, a magnetic sheet, an LED lamp strip, a folding line group, an LED lamp holder, a storage battery pack and a power switch. An LED lamp strip is arranged in the transparent shell, a storage battery pack electrically connected with the LED lamp strip is arranged in the transparent shell, and a power switch connected with the storage battery pack and the LED lamp strip is arranged on the transparent shell; a plurality of magnetic attraction sheets are arranged on the side surface of the transparent shell; a folding line set electrically connected with the storage battery pack and an LED lamp holder electrically connected with the folding line set are further arranged on the outer side of the transparent shell. The level gauge is simple in structure and convenient to operate, solves the problem of measurement of a conventional level gauge under a dark condition, and improves the measurement working efficiency.
Owner:JIANGSU HEHAI ENGINEERING TECHNOLOGY CO LTD

Leveling staff fixing device

The utility model discloses a leveling staff fixing device which comprises a tripod and a clamp holder, the clamp holder is detachably connected with a leveling staff, the tripod is provided with a stand column, the clamp holder is provided with a first universal joint and a second universal joint, the first universal joint is connected with the upper portion of the stand column, and the second universal joint is connected with the lower portion of the stand column. The second universal joint is connected with a telescopic rod, the other end of the telescopic rod is connected with an arc-shaped sliding block through a third universal joint, the arc-shaped sliding block is in sliding connection with an arc-shaped groove formed in the stand column, and the stand column is provided with a locking mechanism for fixing the position of the sliding block. The leveling staff fixing device is convenient to adjust, and the stability of a leveling staff in a vertical state is improved.
Owner:SURVEYING & MAPPING GEOGRAPHIC INFORMATION CENT OF SICHUAN GEOLOGICAL SURVEY & RES INST

An adjustment structure for a leveling rod

ActiveCN224434074ULevel staffBall joint
This utility model provides an adjustment structure for a leveling rod, belonging to the technical field of architectural surveying devices. It solves the problem of improving the applicability of leveling rods. In this adjustment structure, the leveling rod is vertically positioned and includes horizontally positioned upper and lower base plates, spaced vertically apart. The upper end of the leveling rod is hinged to the upper base plate and axially positioned thereon. The lower base plate has a through-hole that extends through both sides of the lower base plate, with a ball joint inside. The lower end of the leveling rod is hinged to the ball joint. Two mutually perpendicular screws are connected horizontally to the side wall of the lower base plate. Each screw can slide along the length of the corresponding side wall of the lower base plate and is positioned thereon. The inner end of each screw is hinged to the ball joint. Each screw can extend into the through-hole and push the ball joint, causing the leveling rod to swing around the hinge point with the upper base plate. This adjustment structure improves the applicability of the leveling rod.
Owner:TAIZHOU VOCATIONAL & TECHN COLLEGE

Leveling rod capable of simultaneously observing day and night

The utility model relates to the technical field of leveling rods, in particular to a leveling rod capable of simultaneously observing day and night, which is convenient for night detection, improves the practicability, is convenient for replacing, installing and fixing a leveling rod main body mechanism, and improves the convenience. Comprising a leveling rod main body mechanism, the leveling rod comprises a leveling rod body mechanism and further comprises a vertical adjusting mechanism, a first lighting mechanism, a position adjusting mechanism, an installation fixing mechanism and a second lighting mechanism, the leveling rod body mechanism is installed at the top end of the vertical adjusting mechanism, the first lighting mechanism is installed on the leveling rod body mechanism, and the position adjusting mechanism is installed on the side wall of the first lighting mechanism. The mounting and fixing mechanism is mounted on the position adjusting mechanism, the second lighting mechanism is mounted on the mounting and fixing mechanism, the whole leveling rod can be conveniently used in an uneven place through the vertical adjusting mechanism, the leveling rod main body mechanism assists a leveling instrument in detection, and the first lighting mechanism is used for lighting the leveling rod main body mechanism.
Owner:SHANDONG SURVEY & DESIGN INST OF WATER CONSERVANCY

Leveling rod perpendicularity automatic correction device

The invention discloses an automatic leveling rod perpendicularity correcting device, which relates to the field of measuring equipment and comprises a correcting frame, a bracket, a correcting ball and the like. The correction frame is provided with a correction cavity for mounting the leveling rod and a slidable protective door, and automatic vertical correction of the leveling rod is realized through the correction ball and the correction rod. The device is simple in structure and convenient to use, and the measuring precision and efficiency of the leveling rod are effectively improved.
Owner:FUZHOU CONSTR DESIGN INST +1

Light reflecting device matched with precise leveling staff

ActiveCN223940281UIncline measurementVertical planeLevel staff
The utility model discloses a light reflecting device matched with a precise leveling staff, which comprises a mounting seat, the top end of the mounting seat is fixedly connected with a fixed cylinder, the top end of the fixed cylinder is movably connected with a mounting clamp, the center line of the fixed cylinder and the center line of the mounting seat are on the same vertical plane, and one side of the top end of the mounting seat is provided with a light reflecting mirror. According to the light reflecting device matched with the precise leveling staff, through the arrangement of the mounting pad, when the device is mounted, the mounting base is connected to the leveling staff in a sleeving mode, the mounting bolt is rotated to rotate in the threaded cylinder, meanwhile, the connecting piece is pushed to move, and the connecting piece pushes the positioning plate to move through the connecting sleeve and is matched with the mounting base to position the device; and an anti-skid pad on one side of the positioning plate and a mounting pad in the mounting base can improve the anti-skid effect, the device and the scale can be effectively prevented from being abraded after mounting, and the problem that the leveling scale cannot be strictly erected under specific conditions is solved.
Owner:自然资源部第一大地测量队(自然资源部精密工程测量院陕西省第一测绘工程院)

A leveling measurement display system and measurement method based on GNSS positioning

PendingCN122408700ALevel staffRemote sensing
This invention discloses a GNSS-based leveling measurement display system and method, comprising a level instrument body, a foresight leveling rod, and a backsight leveling rod. The level instrument body is equipped with an instrument-end positioning unit, the foresight leveling rod is equipped with a front-end positioning device, and the backsight leveling rod is equipped with a rear-end positioning device. The instrument-end positioning unit establishes a wireless communication connection with both the front-end and rear-end positioning devices. The instrument-end positioning unit includes an instrument-end microprocessor, an instrument-end positioning module, and an instrument-end wireless communication module, which are electrically connected to the instrument-end microprocessor. This GNSS-based leveling measurement display system eliminates the need for manual rope pulling and measuring tape measurements, reducing the number of personnel and auxiliary procedures, and significantly improving the efficiency of field leveling measurements.
Owner:HENAN WATER-CONSERVANCY EXPLORATING & SURVEYING CO LTD

Hydraulic structure settlement measuring device

The invention is suitable for the technical field of settlement measurement equipment accessory devices, and provides a hydraulic structure settlement measurement device which comprises a support and a U-shaped clamping block arranged on the support and used for clamping a leveling rod. The threaded cylinder I is rotationally mounted in the mounting groove of the support; the first threaded rod is installed on the first threaded cylinder in a threaded mode and used for adjusting the height of the U-shaped clamping block. The balancing weight is arranged on one side of the U-shaped clamping block and is used for horizontally adjusting the leveling rod; and the centering mechanism is arranged on the support and is used for centering the leveling rod right above the observation nail. According to the hydraulic structure settlement measuring device, the leveling rod is automatically and horizontally placed through the balancing weight, the problem that it is difficult to ensure the high-altitude horizontal state of the leveling rod through manual supporting is solved, the measuring precision is effectively improved, meanwhile, the height of the leveling rod can be conveniently adjusted through the driving mechanism, and accurate alignment of the leveling rod and an observation nail is ensured through the centering mechanism; and the measurement work efficiency is greatly improved.
Owner:NANJING R&D TECH GRP CO LTD

An intelligent leveling system based on three GNSS coordinate cooperation and a measuring method thereof

PendingCN122108056AHeight/levelling measurementLevel staffElectronic notebook
The application provides an intelligent leveling system based on three GNSS coordinate cooperation and a measuring method thereof. The system comprises an intelligent level gauge, a first intelligent leveling rod and a second intelligent leveling rod. All of them are provided with independent GNSS modules and can obtain three-dimensional coordinates in real time. The level gauge can obtain the front and rear sight distances through coordinate inversion and calculate the sight distance difference, and then send the sight distance difference to the display screens of the two rods to guide the first rod to be in place. The leveling rod is provided with an inclination sensor, which can automatically switch among the three states of movement guidance, rod monitoring and righting recording according to the inclination angle, and automatically record the three-dimensional coordinates to form an electronic notebook at the righting moment. The leveling rod can be switched to an RTK mobile station through one key, which is used for layout and recovery of buried leveling points and accurate recovery of temporary leveling points the next day. When the leveling rod is righted for the first time after station migration, the coordinates are automatically compared to realize the detection and tracing of the centimeter-level error. The system can synchronously collect the geodetic height and normal height of each rod point, automatically calculate the height anomaly value and cumulatively form a local height anomaly model.
Owner:江秀

High-low dual-purpose leveling rod

The utility model discloses a high-low dual-purpose leveling rod which comprises a leveling rod body, the body is of a cuboid structure, a first set of scale marking lines with the bottom of the body as an initial reference scale are arranged on the front side face of the body, a leveling bubble assembly is arranged on the rear side face of the body, and a window is formed in the right side face of the body. An expansion side plate is rotationally arranged in the window through a rotating shaft; the expansion side plate is in threaded connection with a settlement hook fixing column; according to the utility model, the extension side plate is additionally arranged on a conventional leveling rod to help the leveling rod to descend and erect the gravity center, so that the leveling rod is more convenient to support, and meanwhile, a new set of reading scale marks is additionally arranged, so that reading and calculation are more convenient; and high and low dual purposes are integrally achieved, and humanization is achieved.
Owner:江苏联建检测科技有限公司 +1

A leveling staff erecting device

The application relates to a leveling rod erecting device, which relates to the technical field of engineering construction measurement and comprises a support frame and a fixing assembly; the support frame comprises a mounting platform and a plurality of support legs which are detachably connected below the mounting platform; the fixing assembly comprises an elastic fixing piece and a spherical cavity arranged on the mounting platform; the elastic fixing piece is accommodated in the spherical cavity and is matched with the spherical surface of the spherical cavity; and the elastic fixing piece is used for clamping and fixing a leveling rod. The leveling rod is automatically swung to a plumb state under the action of gravity through the spherical surface matching of the elastic fixing piece and the spherical cavity, manual repeated calibration is not needed, the measurement efficiency and accuracy are improved, the elastic fixing piece can self-adaptively clamp leveling rods of different specifications, the clamping is stable and the rod surface is not damaged, and the device has the advantages of simple structure, convenient operation and single-person erecting and storage.
Owner:CHINA RAILWAY NO 3 GRP CO LTD +2

Leveling rod convenient for remote rod supporting and observation

The utility model discloses a leveling rod convenient for remote rod supporting and observation, which comprises a leveling rod body, the side surface of the leveling rod body is provided with a rod supporting handle with an overhead middle part, and the upper end and the lower end of the rod supporting handle are fixed on the leveling rod body through bolts; a quick connection hole is formed in the center of the ruler supporting handle, a limiting extrusion rubber ring sleeve is arranged on the inner wall of the quick connection hole, and an auxiliary ruler supporting rod set is inserted into the quick connection hole; the auxiliary ruler supporting rod set comprises at least one auxiliary ruler supporting rod, and when two or more auxiliary ruler supporting rods are adopted, the auxiliary ruler supporting rods are connected in an end-to-end inserting mode and matched with bolts. The leveling rod can be remotely supported by adopting the auxiliary rod supporting rod group, and can be quickly inserted and pulled out through the quick connecting hole in the distance, so that the leveling rod is very suitable for being used in a narrow space, and personnel do not need to carry out near operation.
Owner:江苏联建检测科技有限公司 +1

Leveling rod erecting device for engineering surveying

The utility model discloses a leveling rod erecting device for engineering surveying and belongs to the technical field of engineering surveying. The utility model provides an innovative leveling rod erecting device aiming at the problems that a traditional leveling rod is easy to shake, inconvenient to support, difficult to control the observation precision and the like in the leveling rod erecting process. The device comprises a leveling rod connecting device, a handheld leveling device and a supporting device, the leveling rod connecting device is tightly connected with a leveling rod of any specification through a groove structure, and the leveling rod is quickly leveled through a tubular level on a horizontal supporting plate to ensure strict plumb; the device is provided with the handrails on the two sides, long-time ruler supporting operation is facilitated, and the observation efficiency is improved; in addition, the device can be provided with a supporting frame with a contraction function according to needs, the supporting frame and the leveling rod form a stable structure, static and stable ruler erecting is achieved, the requirement for ruler erecting personnel is lowered, and meanwhile the measuring precision is improved. The leveling device is simple in structure and convenient to operate, is widely applied to various leveling processes, and can remarkably improve the efficiency and the precision of engineering measurement.
Owner:COLLEGE OF SCI & TECH OF THREE GORGES UNIV

Support type surveying and mapping leveling rod

A support type surveying and mapping leveling rod comprises a base and a plurality of supporting legs hinged to the base, a stand column is arranged in the middle of the base in the vertical direction in a penetrating mode, the height of the stand column on the base is adjustable, and the upper portion of the stand column is detachably connected with a clamping mechanism; the clamping mechanism comprises a clamping frame and a first locking piece, one side of the clamping frame is detachably connected with the upper end of the stand column through a quick release assembly, and the clamping frame is provided with an insertion opening. The first locking piece can finely adjust the height position of the surveying and mapping leveling rod on the clamping frame, the surveying and mapping leveling rod is driven to move up and down in cooperation with vertical coarse adjustment of the stand column on the base, and adaptive adjustment can be conducted according to different heights of measured objects in the mode of coarse adjustment and fine adjustment of the height position of the surveying and mapping leveling rod; measurement is facilitated, and the accuracy of measured data is improved.
Owner:SHANDONG UNIV OF SCI & TECH

Leveling rod support

ActiveCN224215094UFlexible moving processavoid falling intoStands/trestlesLevel staffStructural engineering
The utility model relates to the related technical field of leveling rod supports, and one embodiment of the utility model provides a leveling rod support which comprises a main frame and a leveling rod body, the leveling rod body is arranged in the main frame, a supporting and stabilizing assembly is arranged at the bottom of the main frame and the bottom of the leveling rod body, and a sleeving assembly is arranged on the main frame. The supporting and stabilizing assembly comprises a plurality of supporting legs which are arranged at the bottom of the main frame, moving wheels are arranged at the lower ends of the supporting legs, a pair of connecting rods are vertically and movably connected into the main frame in a sleeved mode, a bracket is arranged at the lower ends of the connecting rods, and the lower end of the leveling rod body is inserted into the bracket. By means of the technical scheme, the problems that in the prior art, the contact area between a supporting leg and the ground is small, and a self-adaptive adjusting function is lacked are solved. In the prior art, the support is easy to sink into the ground or incline under the soft ground or the uneven measurement environment, and even if the initial calibration and measurement process is slightly disturbed by external force, the measurement data are not accurate due to shaking.
Owner:HEBEI GEOGRAPHIC INFORMATION GRP CO LTD +1

Leveling rod supporting device

The utility model discloses a leveling rod supporting device, which relates to the technical field of engineering surveying and comprises a supporting seat and a locking mechanism. A through hole for the leveling rod to pass through is formed in the middle of the supporting seat, and a supporting plate is vertically fixed on the edge. The locking mechanism comprises a pull rope, a connecting hole for the pull rope to penetrate through is formed in the supporting plate, the two ends of the pull rope penetrate through the connecting hole to form a locking cavity, and the leveling rod further comprises an elastic assembly for controlling the pull rope to tension and fix the leveling rod on the supporting plate. The device can fix the leveling rod and improve the measurement efficiency and accuracy.
Owner:FUZHOU CONSTR DESIGN INST

A detection device applied to the foundation settlement of a substation

The present invention discloses a detection device applied to the foundation settlement of a substation, which relates to a foundation settlement monitoring device and includes an invar leveling staff. A limiting chute is fixedly connected to the side of the invar leveling staff. Limiting sliders are symmetrically and slidably connected up and down inside the limiting chute. Horizontal fixing rods are fixedly connected to the right sides of the limiting sliders. A number of fixing rings are fixedly connected to the outside of the horizontal fixing rods. The grounding wires of the invar leveling staff alternately pass through the upper and lower fixing rings in sequence; Rotating rods are rotatably connected to the inner sides of the limiting sliders, and the outer ends of the rotating rods are rotatably connected to threaded connection blocks, and fixing bolts are threadedly connected to the threaded connection blocks. The structure of the present invention is simple and convenient to use. When in use, the distance between the fixing rings can be adjusted by loosening and tightening the fixing bolts, and then the length of the grounding wire can be adjusted easily, providing the greatest convenience for the foundation settlement monitoring. After the device is used, it can be quickly retracted, facilitating monitoring at different locations, and the use experience is good.
Owner:HUNAN GOLDEN CABLE ELECTRICAL TECH CO LTD

A leveling device

The utility model relates to a leveling rod device, including level rod board, level rod board can dismantle formula setting on connecting piece, adjusting leg movable type installation is in connecting piece, adjusting leg makes level rod board keep vertical state, flag movable type installation is in connecting piece, to prompt operating personnel, adjusting leg movable type installation is in connecting piece, can according to actual survey ground flatness and inclination, the angle of level rod board carries out real -time, accurate regulation, can according to the operation scene and measurement demand, flexible adjustment position and angle. In the complex survey environment, especially when light is insufficient, the field of vision is limited or the survey personnel distance is far, the flag can attract the attention of operating personnel in an eye -catching way, clearly prompt the accurate position of the leveling rod, avoid the survey deviation or misoperation due to the sight problem, effectively improve the efficiency and safety of the survey operation, also facilitate mutual cooperation between team members, guarantee the smooth progress of the survey work.
Owner:ZHEJIANG HYDROPOWER CONSTR & INSTALLATIONCO