CN107121129A - Compare monitor in a kind of rotary light beam laser slope - Google Patents
Compare monitor in a kind of rotary light beam laser slope Download PDFInfo
- Publication number
- CN107121129A CN107121129A CN201710430705.0A CN201710430705A CN107121129A CN 107121129 A CN107121129 A CN 107121129A CN 201710430705 A CN201710430705 A CN 201710430705A CN 107121129 A CN107121129 A CN 107121129A
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- Prior art keywords
- rotary
- tilt adjustment
- head
- rotary head
- light beam
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to a kind of rotary light beam laser slope than monitor, including slide and the laser beam emitting head for sending rectilinear light beam；The laser beam emitting head is arranged on the rotary head of a rotation；The top of a tilt adjustment bar is arranged on described in rotary head, the bottom of the tilt adjustment bar connects a tilt adjustment axle, and the axis of the tilt adjustment axle is perpendicular to the rotation axis of the rotary head, and the tilt adjustment axle is on the slide；The tilt adjustment axle drives the rotary head to move when rotating；The beneficial effects of the invention are as follows：One light covering of the fan being coincide with soil side slope is constituted using the laser beam of rotation, it is accurately positioned and measures excavation face, available for the construction progress of guiding excavation of earthwork, also the side slope excavated can be detected and corrected, device structure is simple, it is easy to use, practical, reliability is high, can effectively control the gradient and flatness of soil side slope, avoid the earthwork from backbreaking, significantly improve construction quality.
Description
Technical field
Compare monitor the invention belongs to capital construction measurement apparatus, more particularly to a kind of rotary light beam laser slope.
Background technology
In excavation of earthwork construction, in order to reach design requirement and ensure side slope safety, the side slope and level in place are excavated
Face will keep an angle for meeting design requirement, or be slope ratio.If fertile groove is occupied in slope than becoming conference, pacify if slope ratio diminishes
Full performance reduction, backfill amount increase produces claim.Ensure that slope is more of crucial importance than laminating design load.Traditional measuring method is
Fallen using Sopwith staff and line, by Sopwith staff perpendicular to the horizontal traverse of top curve so that the bottom of line pendant just at hole bottom, passes through Sopwith staff
The length gauge of extension elongation and line pendant calculates slope ratio.The defect of this method is to measure afterwards, it is impossible to control excavation project, arbitrarily
Property is larger；Easily influenceed by wind and human factor, it is difficult to obtain accurate measurement data；It is particularly difficult in night time operation,
There is also security risk by the personnel worked on slope side.Such construction method cannot guarantee that the accuracy and side slope of grade of side slope
Flatness, also occur the situation that the earthwork is backbreak unavoidably during earth excavation, construction quality is low and wastes construction money
Source.
The content of the invention
A kind of technical scheme the purpose of the present invention is to propose to rotary light beam laser slope than monitor, improves earthwork construction side
The gradient accuracy and the flatness of side slope on slope, it is to avoid the earthwork is backbreak.
To achieve these goals, the technical scheme is that：A kind of rotary light beam laser slope is than monitor, including swashs
Light emitting head, the laser beam emitting head sends the rectilinear light beam for being irradiated to ground；The laser beam emitting head is arranged on a rotation
Rotary head on, the light beam that the rotation axis of the rotary head is sent perpendicular to the laser beam emitting head；The rotary head can
Adjust the inclination angle between the rotation axis and ground.
Further, the rotary head is arranged on the top of a tilt adjustment bar, and the bottom of the tilt adjustment bar connects
A tilt adjustment axle is connect, the axis of the tilt adjustment axle is perpendicular to the rotation axis of the rotary head, the tilt adjustment
Change the inclination angle between the rotation axis of rotary head and ground when axle is rotated.
Further, the tilt adjustment axle is arranged on a slide；The slide is provided with the driving tilt adjustment
The tilt adjustment gear that axle is rotated.
Further, the slide is provided with the reclining lock screw for locking the tilt adjustment gear.
Further, the tilt adjustment axle is provided with one piece of inclination angle indicator board, and the inclination angle indicator board is provided with and naturally drooped
Weight, the tilt adjustment axle be provided with the tilt adjustment axle rotate inclination needle.
Further, the rotary light beam laser slope is provided with frame than monitor, and the frame is provided with slide rail, the cunning
The rear end of rail and the rear end of the frame are hinged, and the front end of the frame is rolled to each side provided with the driving slide rail to the frame
Adjusting screw；The slide is to be slidably installed on the slide rail and be slided along slide rail, the axle of the tilt adjustment axle
Glide direction of the line perpendicular to the slide.
Further, the rotary head is the rotary head continuously rotated, and the rotary head is provided with 4~16 laser
Emitting head, the laser beam emitting head is with rotary head rotation axis circumference equal dividing；The rotary speed of the rotary head be 20r/min~
40r/min。
Further, the rotary head, which is provided with, blocks the laser beam emitting head upward or the shading of light beam that is laterally emitted
Cover.
Further, the rotary head is the rotary head of reciprocating rotary, and the rotary head is set in the range of less than 180 °
There are multiple laser beam emitting heads with rotary head rotation axis circumference equal dividing, the reciprocating rotary angle of the rotary head is not less than
Angle between laser beam emitting head described in adjacent two.
Further, the reciprocating rotary frequency of the rotary head is 40 times/min~100 time/min.
The beneficial effects of the invention are as follows：One light covering of the fan being coincide with soil side slope, essence are constituted using the laser beam of rotation
It is determined that position and measurement excavation face, available for the construction progress of guiding excavation of earthwork, can also be detected to the side slope excavated
And correction, more prominent in effect of working at night, device structure is simple, easy to use, practical, and reliability is high, can be effective
Control the gradient and flatness of soil side slope, it is to avoid the earthwork is backbreak, and significantly improves construction quality.
The present invention is described in detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is structure chart of the present invention；
Fig. 2 is carriage portion enlarged drawing of the present invention；
Fig. 3 is Fig. 1 A partial enlarged drawings；
Fig. 4 is the rotary head structure chart that the present invention is provided with light shield；
Fig. 5 is rotary head structure chart of the present invention provided with 16 laser beam emitting heads；
Fig. 6 is the structure chart of reciprocating rotary rotary head of the present invention；
Fig. 7 is operation chart of the present invention, with four laser beam emitting heads, constitutes 180 ° of light covering of the fans；
Fig. 8 is operation chart of the present invention, with 16 laser beam emitting heads, makes up less than 180 ° of light covering of the fan.
Embodiment
As shown in Figure 1, Figure 2, Fig. 3, a kind of rotary light beam laser slope is than monitor, including laser beam emitting head 20, the laser hair
Hair is penetrated to go out to be irradiated to the rectilinear light beam on ground；The laser beam emitting head is arranged on the rotary head 30 of a rotation, described turn
The light beam that the rotation axis of dynamic head is sent perpendicular to the laser beam emitting head；The rotary head can adjust the rotation axis with
Tilt angle gamma between ground.
The rotary head is arranged on the top of a tilt adjustment bar 41, and the bottom of the tilt adjustment bar connects one and inclined
Angle adjustment axis 42, the axis of the tilt adjustment axle is perpendicular to the rotation axis of the rotary head, the tilt adjustment axle rotation
When change rotary head rotation axis and ground between tilt angle gamma.
The tilt adjustment axle is arranged on a slide 10；The slide is rotated provided with the driving tilt adjustment axle
Tilt adjustment gear 43.
The slide is provided with the reclining lock screw 44 for locking the tilt adjustment gear.
The tilt adjustment axle is provided with the weight naturally drooped provided with one piece of inclination angle indicator board 51, the inclination angle indicator board
52, the tilt adjustment axle is provided with the inclination needle 45 rotated with the tilt adjustment axle.
The rotary light beam laser slope is provided with frame 60 than monitor, and the frame is provided with slide rail 70, the slide rail
Rear end and the rear end of the frame are hinged, and the front end of the frame is provided with the tune for driving the slide rail to be rolled to each side to the frame
Save leading screw 71；The slide is to be slidably installed on the slide rail and be slided along slide rail, the axis of the tilt adjustment axle
Perpendicular to the glide direction of the slide.
As shown in Figure 4, Figure 5, the rotary head is the rotary head continuously rotated, and the rotary head is provided with 4~16 institutes
Laser beam emitting head is stated, the laser beam emitting head is with rotary head rotation axis circumference equal dividing；The rotary speed of the rotary head is
20r/min~40r/min.
The rotary head, which is provided with, blocks the laser beam emitting head upward or the light shield 80 of light beam that is laterally emitted.
The rotary head is the rotary head of reciprocating rotary, and the rotary head is in the range of less than 180 ° provided with multiple to turn
The laser beam emitting head of dynamic head rotation axis circumference equal dividing, the reciprocating rotary angle [alpha] of the rotary head is not less than adjacent two institute
State the angle β between laser beam emitting head.
The reciprocating rotary frequency of the rotary head is 40 times/min~100 time/min.
Embodiment one：
Such as Fig. 1 is to Fig. 3, and a kind of rotary light beam laser slope is than monitor, including slide 10 and the Laser emission for sending rectilinear light beam
First 20.
In the present embodiment, there are four laser beam emitting heads to be arranged on the rotary head 30 of a rotation, rotary head is continuous outstanding
Dynamic rotary head, four laser beam emitting heads are distributed with rotary head rotation axis circumference equal dividing, and the power of laser beam emitting head is
200mW, laser beam emitting head sends red or green linear laser light beam.The rotation axis of rotary head is perpendicular to laser beam emitting head
The light beam sent.Rotary head drives laser beam emitting head rotation, the laser for sending laser beam emitting head provided with a motor 31
Beam 21 constitutes a light covering of the fan（As shown in Figure 7）.The rotating speed of rotary head is 20r/min~40r/min.
Rotary head is arranged on the top of a tilt adjustment bar 41, and the rotation axis of tilt adjustment bar and rotary head is coaxial.
The bottom of tilt adjustment bar connects a tilt adjustment axle 42, and the axis of tilt adjustment axle is perpendicular to tilt adjustment bar（It is i.e. vertical
In the rotation axis of rotary head）.Tilt adjustment axle is arranged on slide by bearing 46；Drive and rotate when tilt adjustment axle is rotated
Head is mobile, the tilt angle gamma between regulation rotary head rotation axis and ground, so as to adjust light covering of the fan and the ground that rotary head is sent
Between angle.
Slide is provided with tilt adjustment gear 43, and driving tilt adjustment axle is rotated.In the present embodiment, tilt adjustment gear includes
A pair of driving gear pairs, are engaged by the larger driven gear of a less driving gear and one, realize larger gearratio,
With the rotational angle of more accurate adjustment tilt adjustment axle.
Reclining lock screw 44 of the slide provided with locking tilt adjustment gear.Reclining lock screw top pressure driven gear, makes
Tilt adjustment axle is maintained on the position of setting.
Rotary light beam laser slope is provided with inclination angle display device than monitor, including one piece with graduated inclination angle indicator board
51, inclination angle indicator board by bearing 53 be arranged on tilt adjustment axle one end, inclination angle indicator board be provided with naturally droop weight 52,
Inclination angle indicator board is not rotated with tilt adjustment axle, keep the relative position with ground.The termination of tilt adjustment axle, which is provided with, inclines
Angle pointer 45, inclination needle points to the scale on the indicator board of inclination angle, and inclination needle is rotated with tilt adjustment axle, indicated by inclination angle
The rotational angle of the graduation indication tilt adjustment axle of plate.
Rotary light beam laser slope is provided with frame 60 than monitor, and frame is provided with four supporting legs 61, in order to which stable is placed on
On soil ground, supporting leg is provided with the cutting shoe 62 that can be inserted into soil.
Frame is provided with the slide rail 70 of horizontal direction, and the upper end of slide rail is a dovetail guide, the rear end of slide rail with it is described
The rear end of frame is hinged by bearing pin 63.The front end of frame is provided with the regulation silk for driving the slide rail to be rolled to each side to the frame
Thick stick 71；The bottom surface of slide rail is provided with T-slot 72, and the T-slot of slide rail connects adjusting screw by sliding block 73.
Slide is provided with the dovetail groove coordinated with the dovetail guide of slide rail.Slide is to be slidably installed on slide rail and along cunning
Rail is slided, front and back position of the adjustment slide in frame.Glide direction of the axis of tilt adjustment axle perpendicular to slide.
As shown in fig. 7, the rotary light beam laser slope of the present embodiment than monitor guide excavation of earthwork construct when, by frame
On the ground for being placed in excavation regions side, make the bearing of trend of slide rail as far as possible perpendicular to excavation line, frame is adjusted with horizon rule
Supporting leg, be horizontal slide rail.By tilt adjustment pinion rotation tilt adjustment axle, inclination needle is in inclination angle indicator board
On indicate laser beam constitute light covering of the fan and ground（Horizontal plane）Between inclination angle, by the Inclination maneuver of light covering of the fan to design will
The angle asked, then locks the inclination angle of light covering of the fan by reclining lock screw.Laser beam emitting head is opened, the smooth covering of the fan is on ground
On irradiate a light, slide slide on slide rail, adjust the front and back position of light covering of the fan；Light covering of the fan is adjusted by adjusting screw
Angle between excavation line, makes light covering of the fan be overlapped with excavation line.Then promote again in slide to excavation line at 8cm~10cm.
Excavator is started working, and 8cm~10cm or so is outwards excavated according to seen light, realizes real-time slope than control.
Because rotary head is provided with four laser beam emitting heads, excavated surface can be made to keep the photograph of at least two laser beams
Penetrate, the requirement that guiding is excavated can be met.More laser beam emitting heads can produce more preferable effect.In order to prevent laser beam to ground
Direction more than face is irradiated and causes light pollution, and the rotary light beam laser slope of the present embodiment is additionally provided with control device than monitor,
Stop sending light beam when making the Beam rotation of laser beam emitting head on ground, form irradiation light covering of the fan downwards, light covering of the fan
Segment angle θ is 180 °.
Embodiment two：
Such as Fig. 4, monitor is compared on a kind of rotary light beam laser slope.The present embodiment is a kind of rotary light beam laser slope to embodiment one
Than the improvement of monitor.In the present embodiment, the rotary head is provided with light shield 80, and the angle of blocking of light shield is not less than 180 °,
Light shield is blocked laser beam emitting head upward or the light beam that is laterally emitted, prevent laser beam from causing light pollution to environment, to people
Member damages.
Compared with scheme with embodiment one using control device, using glare shield controls laser beam direction of illumination more
To be simple and practical, reliability is also higher.
Embodiment three：
Such as Fig. 5, monitor is compared on a kind of rotary light beam laser slope.The present embodiment is a kind of rotary light beam laser slope to embodiment one
Than the improvement of monitor.In the present embodiment, there are 16 laser beam emitting heads 20 to be arranged on rotary head 30, rotary head is continuous turns
Dynamic rotary head, 16 laser beam emitting heads are distributed with rotary head rotation axis circumference equal dividing.Compared with embodiment one, use
16 laser beam emitting head tools are clearly light covering of the fan, there is more preferable display effect.
In addition, as shown in figure 8, excavated surface keep at least two laser beams irradiation under conditions of, the present embodiment
Smaller segment angle θ can be used, excavation of earthwork and monitoring are guided to less excavated surface or partial duty face, made
There is more preferable flexibility in.
Example IV：
Such as Fig. 6, monitor is compared on a kind of rotary light beam laser slope.The present embodiment is a kind of rotary light beam laser slope to embodiment one
Than the improvement of monitor.In the present embodiment, there are eight laser beam emitting heads 20 to be arranged on rotary head 30, eight laser beam emitting heads exist
It is distributed in the range of less than 180 ° with rotary head rotation axis circumference equal dividing.In the present embodiment, between adjacent two laser beam emitting heads
Angle β=22.5 °, eight laser beam emitting heads in the range of 157.5 ° circumference equal dividing be distributed.
Rotary head is the rotary head of reciprocating rotary, and motor 31 is stepper motor, can easily control the past of rotary head
Multiple anglec of rotation α, reciprocating rotary angle [alpha] should be not less than the angle β between laser beam emitting head described in adjacent two, make laser beam emitting head
The light beam sent constitutes a continuous light covering of the fan.In the present embodiment, reciprocating rotary angle [alpha]=22.5 °, equal to described in adjacent two
Angle β between laser beam emitting head.
When eight laser beam emitting heads are all turned on, rotary head reciprocating rotary makes the light of light beam one 180 ° of segment angle of composition
Covering of the fan.
In the present embodiment, rotary head use reciprocating rotary mode, compared with embodiment one, it is not necessary to use conducting ring for
Rotary head is powered and implements to control, and can directly be powered using cable and be implemented to control.Reliability is higher.
The need for can be according to engineering, the laser beam emitting head of varying number be opened, the angle of rotary head reciprocating rotary is adjusted,
The adjustment to working face range of exposures can be conveniently realized.Practicality is stronger, operates more convenient.
Claims (10)
1. a kind of rotary light beam laser slope is than monitor, including laser beam emitting head, the laser beam emitting head, which is sent, is irradiated to ground
Rectilinear light beam；Characterized in that, the laser beam emitting head is arranged on the rotary head of a rotation, the rotation of the rotary head
The light beam that axis is sent perpendicular to the laser beam emitting head；The rotary head can be adjusted between the rotation axis and ground
Inclination angle.
2. monitor is compared on a kind of rotary light beam laser slope according to claim 1, it is characterised in that the rotary head is installed
On the top of a tilt adjustment bar, the bottom of the tilt adjustment bar connects a tilt adjustment axle, the tilt adjustment axle
Axis perpendicular to the rotation axis of the rotary head, change the rotation axis and ground of rotary head when the tilt adjustment axle is rotated
Inclination angle between face.
3. monitor is compared on a kind of rotary light beam laser slope according to claim 2, it is characterised in that the tilt adjustment axle
On a slide；The slide is provided with the tilt adjustment gear for driving the tilt adjustment axle to rotate.
4. monitor is compared on a kind of rotary light beam laser slope according to claim 3, it is characterised in that the slide is provided with lock
The reclining lock screw of the fixed tilt adjustment gear.
5. monitor is compared on a kind of rotary light beam laser slope according to claim 2, it is characterised in that the tilt adjustment axle
Provided with one piece of inclination angle indicator board, the inclination angle indicator board is provided with the weight naturally drooped, and the tilt adjustment axle is provided with described
The inclination needle that tilt adjustment axle is rotated.
6. monitor is compared on a kind of rotary light beam laser slope according to claim 2, it is characterised in that the rotary light beam swashs
Light slope is provided with frame than monitor, and the frame is provided with slide rail, and the rear end of the slide rail and the rear end of the frame are hinged, institute
The front end of frame is stated provided with the adjusting screw for driving the slide rail to be rolled to each side to the frame；The slide is with the peace that is slidably matched
Slided on the slide rail and along slide rail, the glide direction of the axis of the tilt adjustment axle perpendicular to the slide.
7. monitor is compared on a kind of rotary light beam laser slope according to claim 1, it is characterised in that the rotary head is to connect
The continuous rotary head rotated, the rotary head is revolved provided with 4~16 laser beam emitting heads, the laser beam emitting head with rotary head
Shaft axis circumference equal dividing；The rotary speed of the rotary head is 20r/min~40r/min.
8. monitor is compared on a kind of rotary light beam laser slope according to claim 7, it is characterised in that the rotary head is provided with
Block the laser beam emitting head upward or the light shield of light beam that is laterally emitted.
9. monitor is compared on a kind of rotary light beam laser slope according to claim 1, it is characterised in that the rotary head is past
The rotary head rotated again, the rotary head is in the range of less than 180 ° provided with multiple with rotary head rotation axis circumference equal dividing
The laser beam emitting head, the reciprocating rotary angle of the rotary head is not less than the angle between laser beam emitting head described in adjacent two.
10. monitor is compared on a kind of rotary light beam laser slope according to claim 1, it is characterised in that the rotary head
Reciprocating rotary frequency is 40 times/min~100 time/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430705.0A CN107121129B (en) | 2017-06-09 | 2017-06-09 | Rotary light beam laser slope ratio monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430705.0A CN107121129B (en) | 2017-06-09 | 2017-06-09 | Rotary light beam laser slope ratio monitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107121129A true CN107121129A (en) | 2017-09-01 |
| CN107121129B CN107121129B (en) | 2023-09-29 |
Family
ID=59729735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710430705.0A Active CN107121129B (en) | 2017-06-09 | 2017-06-09 | Rotary light beam laser slope ratio monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107121129B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351476A (en) * | 2020-03-07 | 2020-06-30 | 智博兴(武汉)测绘有限公司 | Supporting and adjusting device for land survey |
| CN114877867A (en) * | 2022-04-30 | 2022-08-09 | 山东省煤田地质局第五勘探队 | Portable geological geometry measuring instrument |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0727642A1 (en) * | 1995-02-14 | 1996-08-21 | Kabushiki Kaisha Topcon | Laser survey instrument |
| CN2320985Y (en) * | 1998-03-04 | 1999-05-26 | 吴小勇 | Digital display laser slope measuring instrument |
| CN2651705Y (en) * | 2003-10-31 | 2004-10-27 | 吴小勇 | Laser slope engineering electronic theodolite |
| CN1629601A (en) * | 2003-12-15 | 2005-06-22 | 上海浩顺科技有限公司 | Laser test control device and method for pavement construction flatness |
| JP2013245978A (en) * | 2012-05-24 | 2013-12-09 | Noboru Suzuki | Gradient index device and light-receiving gauge |
| CN207007158U (en) * | 2017-06-09 | 2018-02-13 | 中国新兴建筑工程总公司 | Compare monitor in a kind of rotary light beam laser slope |
-
2017
- 2017-06-09 CN CN201710430705.0A patent/CN107121129B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0727642A1 (en) * | 1995-02-14 | 1996-08-21 | Kabushiki Kaisha Topcon | Laser survey instrument |
| CN2320985Y (en) * | 1998-03-04 | 1999-05-26 | 吴小勇 | Digital display laser slope measuring instrument |
| CN2651705Y (en) * | 2003-10-31 | 2004-10-27 | 吴小勇 | Laser slope engineering electronic theodolite |
| CN1629601A (en) * | 2003-12-15 | 2005-06-22 | 上海浩顺科技有限公司 | Laser test control device and method for pavement construction flatness |
| JP2013245978A (en) * | 2012-05-24 | 2013-12-09 | Noboru Suzuki | Gradient index device and light-receiving gauge |
| CN207007158U (en) * | 2017-06-09 | 2018-02-13 | 中国新兴建筑工程总公司 | Compare monitor in a kind of rotary light beam laser slope |
Non-Patent Citations (1)
| Title |
|---|
| 郝生雷;: "可调节坡度激光指向仪的设计应用" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351476A (en) * | 2020-03-07 | 2020-06-30 | 智博兴(武汉)测绘有限公司 | Supporting and adjusting device for land survey |
| CN114877867A (en) * | 2022-04-30 | 2022-08-09 | 山东省煤田地质局第五勘探队 | Portable geological geometry measuring instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107121129B (en) | 2023-09-29 |
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Address after: 100009 Pei Yongli No. 3, Xicheng District, Beijing Applicant after: CHINA XINXING CONSTRUCTION ENGINEERING Co.,Ltd. Address before: 100079 Beijing City, Fengtai District Yongwai, Shun eight No. 9 Applicant before: CHINA XINXING BUILDING ENGINEERING Corp. |
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