CN107587774A - A kind of only pipe tower with regulation antenna feeder signal receiving angle - Google Patents
A kind of only pipe tower with regulation antenna feeder signal receiving angle Download PDFInfo
- Publication number
- CN107587774A CN107587774A CN201711003726.0A CN201711003726A CN107587774A CN 107587774 A CN107587774 A CN 107587774A CN 201711003726 A CN201711003726 A CN 201711003726A CN 107587774 A CN107587774 A CN 107587774A
- Authority
- CN
- China
- Prior art keywords
- antenna feeder
- rod
- group
- tabular
- tabular antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/18—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
Abstract
The present invention relates to communications tower field,More particularly to a kind of only pipe tower with regulation antenna feeder signal receiving angle,Include the body of rod,It is arranged on the tabular antenna feeder group of body of rod epimere,Linkage and to drive the drive component of tabular antenna feeder group folding,The top of the body of rod is provided with the cylindrical mounting groove for accommodating drive component,Drive component includes motor,Jacking sleeve and articulated joint,The tabular antenna feeder of line angularly poor arrangement centered on tabular antenna feeder group includes several axis by the body of rod,Linkage includes first connecting rod group and second connecting rod group,The top of tabular antenna feeder group is hinged by the top of first connecting rod group and articulated joint,The bottom of tabular antenna feeder group is located at articulated joint location directly below with the body of rod by second connecting rod group and is hinged,The tabular antenna feeder of the present invention and body of rod adjustable angle,Pointed to by adjusting tabular antenna feeder in real time,Make the intensity that signal receives all the time more than basic value,Ensure the stability that signal receives.
Description
Technical field
The present invention relates to communications tower field, more particularly to a kind of only pipe tower with regulation antenna feeder signal receiving angle.
Background technology
Communications tower includes a variety of solely pipe communications tower, angle steel communications tower, three column jecket communications towers, lamp stand communications tower, roofs
Decoration type communications tower, integrated base station（Lifting tower）, artificial tree communications tower and communication heightening frame, communication pole etc..
Integrated base station has generally comprised an outdoor cabinet, then battery, power module, transport module, base band
Unit（Base Band Unit is also placed in interior sometimes）Deng all installing concentratedly inside this Cabinet, then in terrace or steel tower
（Generally only pipe tower）Upper installation antenna feeder, integrated base station some are used for the capacity station in urban district.
But have the position disunity with the installation of only pipe tower, but antenna feeder is typically all to be fixedly mounted on only pipe tower now
Top, angle is unadjustable, and when causing the signal to receive, signal intensity has power to differ, and signal is received and causes to perplex.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of with regulation antenna feeder signal receiving angle
Only pipe tower.
To solve the above problems, the present invention provides following technical scheme：
A kind of only pipe tower with regulation antenna feeder signal receiving angle, includes the body of rod, is arranged on the tabular day of body of rod epimere
Feeder line group, linkage and to drive the drive component of tabular antenna feeder group folding, the top of the body of rod is provided with for accommodating
The cylindrical mounting groove of drive component, the axis of mounting groove overlap with the axis of the body of rod, and drive component includes motor, risen
Sleeve and articulated joint are dropped, and motor is arranged on the inside bottom of mounting groove and its output end is vertical upward, jacking sleeve socket
On the output shaft of motor, coordinate on the inside of jacking sleeve with driving motor output shaft screw thread, articulated joint is socketed in lifting set
On cylinder, the tabular antenna feeder of line angularly poor arrangement centered on tabular antenna feeder group includes several axis by the body of rod, even
Linkage includes first connecting rod group and second connecting rod group, and the top of tabular antenna feeder group passes through first connecting rod group and articulated joint
Top edge is hinged, and the bottom of tabular antenna feeder group is located at articulated joint location directly below by second connecting rod group and the body of rod and cut with scissors
Connect.
Further, the drive component also includes the fixed cylinder being arranged in mounting groove, the axis of the fixed cylinder
Overlapped with the axis of driving motor output shaft, the bottom of fixed cylinder is fixedly connected with motor, and fixed cylinder is provided with receiving and driven
The through hole of dynamic motor output shaft and jacking sleeve, the top edge of the fixes sleeve are provided with what is be fixedly connected with body of rod top
Flanging.
Further, the articulated joint bottom is integrally formed with connecting cylinder, the axis of connecting cylinder and the axis weight of fixed cylinder
Close, fixed cylinder is provided with the tubular groove for accommodating connecting cylinder, and the cross section of fixed cylinder is annual ring grain shape.
Further, the first connecting rod group includes several head rods coordinated one by one with tabular antenna feeder,
One end and the top of tabular antenna feeder of each head rod are hinged, head rod one end and hinge away from tabular antenna feeder
The top edge of joint is hinged.
Further, the second connecting rod group includes the second connecting rod that several coordinate one by one with tabular antenna feeder,
One end and the bottom of tabular antenna feeder of each second connecting rod are hinged, all one end of second connecting rod away from tabular antenna feeder
It is connected by clamping part with the body of rod, edge of all one end of second connecting rod away from tabular antenna feeder with clamping part is hinged.
Further, all head rods line angularly poor arrangement centered on the axis of the body of rod, it is all described
The line angularly poor arrangement centered on the axis of the body of rod of second connecting rod,
Further, the middle epimere of the body of rod is provided with control cabinet, and controller and signal strength detection are provided with control cabinet
Instrument, motor and signal strength detection instrument are electrically connected with controller, and all tabular antenna feeders are and signal strength detection
Instrument communication connection.
Further, the epimere of the body of rod is installed with lightning rod, and lightning rod is vertically arranged, the bottom electricity of lightning rod
Property is connected with arrester, arrester ground.
Further, the bottom of the flanging of the fixed cylinder is provided with sealing ring.
Beneficial effect：A kind of only pipe tower with regulation antenna feeder signal receiving angle of the present invention, when signal intensity is examined
When survey instrument detects that the intensity that signal receives is less than basic value, one electric signal of transmission is electric to controller, controller control driving
Machine rotates, driving jacking sleeve lifting, so as to which pushing tow articulated joint lifting drives all tabular antenna feeder pictures by first connecting rod group
Petal-shaped folding, change the angle with the body of rod of tabular antenna feeder, while tabular antenna feeder rotates, signal strength detection instrument
Monitoring tabular antenna feeder signal receiving strength in real time, when tabular antenna feeder signal receiving strength is higher than basic value, controller control
Motor processed stops operating, tabular antenna feeder and body of rod adjustable angle, by adjusting the sensing of tabular antenna feeder in real time, so that
The intensity that receives of signal all the time more than basic value, ensure the stability that signal receives.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is the front view of the present invention；
Fig. 3 is sectional views of the Fig. 2 along line A-A；
Fig. 4 is the tabular antenna feeder of the present invention and the structural decomposition diagram one of linkage；
Fig. 5 is the tabular antenna feeder of the present invention and the structural decomposition diagram two of linkage；
Fig. 6 is the structural decomposition diagram one of drive component of the present invention；
Fig. 7 is the structural decomposition diagram two of drive component of the present invention；
Description of reference numerals：The body of rod 1, mounting groove 1a, tabular antenna feeder group 2, tabular antenna feeder 2a, linkage 3, the first connection
Bar 3a, the second connecting rod 3b, drive component 4, motor 4a, jacking sleeve 4b, articulated joint 4c, connecting cylinder 4c1, fixed cylinder
4d, tubular groove 4d1, flanging 4d2, control cabinet 5, controller 5a, lightning rod 6, clamping part 7.
Embodiment
With reference to Figure of description and embodiment, the specific embodiment of the present invention is described in further detail：
Referring to figs. 1 to a kind of only pipe tower with regulation antenna feeder signal receiving angle shown in Fig. 7, include the body of rod 1, set
In the tabular antenna feeder group 2 of the epimere of the body of rod 1, linkage 3 and to drive the drive component 4 of the folding of tabular antenna feeder group 2, bar
The top of body 1 is provided with the cylindrical mounting groove 1a for accommodating drive component 4, mounting groove 1a axis and the axis of the body of rod 1
Overlap, drive component 4 includes motor 4a, jacking sleeve 4b and articulated joint 4c, and motor 4a is arranged on mounting groove 1a
Inside bottom and its output end it is vertical upward, jacking sleeve 4b is socketed on motor 4a output shaft, jacking sleeve 4b
Inner side coordinates with motor 4a output axle threads, and articulated joint 4c is socketed on jacking sleeve 4b, and tabular antenna feeder group 2 includes
The tabular antenna feeder 2a of several line angularly poor arrangements centered on the axis of the body of rod 1, linkage 3 include first connecting rod
Group and second connecting rod group, the top of tabular antenna feeder group 2 are hinged by first connecting rod group and articulated joint 4c top edge, tabular
The bottom of antenna feeder group 2 is located at articulated joint 4c location directly below with the body of rod 1 by second connecting rod group and is hinged, motor 4a rotations
Turn, the 4b liftings of driving jacking sleeve, so as to which pushing tow articulated joint 4c liftings drive all tabular antenna feeder 2a by first connecting rod group
As petal-shaped folding.
Operation principle：When signal strength detection instrument detects that the intensity that signal receives is less than basic value, an electricity is transmitted
Signal gives controller 5a, controller 5a control motor 4a rotations, driving jacking sleeve 4b liftings, so as to pushing tow articulated joint 4c
Lifting drives all tabular antenna feeder 2a as petal-shaped folding by first connecting rod group, change tabular antenna feeder 2a with the body of rod 1
Angle, while tabular antenna feeder 2a is rotated, signal strength detection instrument monitor in real time tabular antenna feeder 2a signals receive it is strong
Degree, when tabular antenna feeder 2a signal receiving strengths are higher than basic value, controller 5a controls motor 4a stops operating.
The drive component 4 also includes the fixed cylinder 4d being arranged in mounting groove 1a, the axis of the fixed cylinder 4d with
The axis of motor 4a output shafts is overlapped, and fixed cylinder 4d bottom is fixedly connected with motor 4a, and fixed cylinder 4d is provided with
Motor 4a output shafts and jacking sleeve 4b through hole are accommodated, the top edge of the fixes sleeve is provided with pushes up with the body of rod 1
The flanging 4d2 that portion is fixedly connected, motor 4a are placed in mounting groove 1a, are then fixedly connected by fixed cylinder 4d with the body of rod 1.
The articulated joint 4c bottoms are integrally formed with connecting cylinder 4c1, connecting cylinder 4c1 axis and fixed cylinder 4d axis weight
To close, the cross section that fixed cylinder 4d is provided with tubular groove 4d1, fixed cylinder 4d for accommodating connecting cylinder 4c1 is annual ring grain shape,
When jacking sleeve 4b jacks up articulated joint 4c, tubular groove 4d1 ensures that articulated joint 4c liftings are steady.
The first connecting rod group includes several head rod 3a, Mei Ge for coordinating one by one with tabular antenna feeder 2a
One connecting rod 3a one end and tabular antenna feeder 2a top are hinged, the one end of head rod 3a away from tabular antenna feeder 2a with
Articulated joint 4c top edge is hinged, and drive component 4 drives all tabular antenna feeder 2a top by all head rod 3a
Portion is apart from the far and near reciprocating motion in the top of the body of rod 1.
The second connecting rod group includes several the second connecting rod 3b, Mei Ge coordinated one by one with tabular antenna feeder 2a
Two connecting rod 3b one end and tabular antenna feeder 2a bottom are hinged, all second connecting rod 3b away from tabular antenna feeder 2a one
End be connected by clamping part 7 with the body of rod 1, the one end of all second connecting rod 3b away from tabular antenna feeder 2a with clamping part 7
Edge is hinged, and tabular antenna feeder 2a is be hinged by the second connecting rod 3b and clamping part 7, tabular antenna feeder 2a in rotation process,
Tabular antenna feeder 2a bottom movement range is smaller than the top movement range of itself, and all tabular antenna feeder 2a can be realized as petal
Shape folding.
All head rod 3a line angularly poor arrangements centered on the axis of the body of rod 1, all described second connect
Extension bar 3b line angularly poor arrangements centered on the axis of the body of rod 1, ensure tabular antenna feeder group 2 in the state of folding, it is adjacent
Head rod 3a will not contradict, the second adjacent connecting rod 3b will not be contradicted, and avoid tabular antenna feeder 2a motion state
Normally.
The middle epimere of the body of rod 1 is provided with control cabinet 5, and controller 5a and signal strength detection are provided with control cabinet 5
Instrument, motor 4a and signal strength detection instrument are electrically connected with controller 5a, and all tabular antenna feeder 2a are strong with signal
Spend detector communication connection, signal strength detection instrument detects tabular antenna feeder 2a signal receiving strengths in real time, controller 5a according to
Signal strength detection instrument transmits next electric signal to limit tabular antenna feeder 2a position, the controller 5a existing skill of model
Art, no longer it is described in detail herein.
The epimere of the body of rod 1 is installed with lightning rod 6, and lightning rod 6 is vertically arranged, and the bottom of lightning rod 6 electrically connects
Arrester is connected to, arrester ground, is avoided under thunderstorm weather, drive component 4 is electrically shocked.
The flanging 4d2 of fixed cylinder 4d bottom is provided with sealing ring, avoids rainwater from entering mounting groove 1a, to driving electricity
Machine 4a has been damaged.
The above described is only a preferred embodiment of the present invention, any limit not is made to the technical scope of the present invention
System, therefore any subtle modifications, equivalent variations and modifications that every technical spirit according to the present invention is made to above example,
In the range of still falling within technical scheme.
Claims (9)
- A kind of 1. only pipe tower with regulation antenna feeder signal receiving angle, it is characterised in that：Include the body of rod（1）, be arranged on The body of rod（1）The tabular antenna feeder group of epimere（2）, linkage（3）With driving tabular antenna feeder group（2）The driving group of folding Part（4）, the body of rod（1）Top be provided with for accommodating drive component（4）Cylindrical mounting groove（1a）, mounting groove（1a）Axle Line and the body of rod（1）Axis overlap, drive component（4）Include motor（4a）, jacking sleeve（4b）And articulated joint（4c）, Motor（4a）It is arranged on mounting groove（1a）Inside bottom and its output end it is vertical upward, jacking sleeve（4b）It is socketed in drive Dynamic motor（4a）Output shaft on, jacking sleeve（4b）Inner side and motor（4a）Export axle thread to coordinate, articulated joint（4c） It is socketed in jacking sleeve（4b）On, tabular antenna feeder group（2）Include several with the body of rod（1）Axis centered on line angularly The tabular antenna feeder of difference arrangement（2a）, linkage（3）Include first connecting rod group and second connecting rod group, tabular antenna feeder group （2）Top pass through first connecting rod group and articulated joint（4c）Top edge be hinged, tabular antenna feeder group（2）Bottom pass through Two connection rod sets and the body of rod（1）Positioned at articulated joint（4c）Location directly below is hinged.
- A kind of 2. only pipe tower with regulation antenna feeder signal receiving angle according to claim 1, it is characterised in that：Institute State drive component（4）Also include and be arranged on mounting groove（1a）Interior fixed cylinder（4d）, the fixed cylinder（4d）Axis and drive Dynamic motor（4a）The axis of output shaft overlaps, fixed cylinder（4d）Bottom and motor（4a）It is fixedly connected, fixed cylinder（4d） It is provided with receiving motor（4a）Output shaft and jacking sleeve（4b）Through hole, the top edge of the fixes sleeve is provided with With the body of rod（1）The flanging that top is fixedly connected（4d2）.
- A kind of 3. only pipe tower with regulation antenna feeder signal receiving angle according to claim 2, it is characterised in that：Institute State articulated joint（4c）Bottom is integrally formed with connecting cylinder（4c1）, connecting cylinder（4c1）Axis and fixed cylinder（4d）Axis weight Close, fixed cylinder（4d）It is provided with for accommodating connecting cylinder（4c1）Tubular groove（4d1）, fixed cylinder（4d）Cross section be year Take turns textured.
- A kind of 4. only pipe tower with regulation antenna feeder signal receiving angle according to claim 1, it is characterised in that：Institute State first connecting rod group and include several and tabular antenna feeder（2a）The head rod coordinated one by one（3a）, each first connection Bar（3a）One end and tabular antenna feeder（2a）Top be hinged, head rod（3a）Away from tabular antenna feeder（2a）One end With articulated joint（4c）Top edge be hinged.
- A kind of 5. only pipe tower with regulation antenna feeder signal receiving angle according to claim 4, it is characterised in that：Institute State second connecting rod group and include several and tabular antenna feeder（2a）The second connecting rod coordinated one by one（3b）, each second connection Bar（3b）One end and tabular antenna feeder（2a）Bottom be hinged, all second connecting rods（3b）Away from tabular antenna feeder（2a）'s One end passes through clamping part（7）With the body of rod（1）Connection, all second connecting rods（3b）Away from tabular antenna feeder（2a）One end with Clamping part（7）Edge be hinged.
- A kind of 6. only pipe tower with regulation antenna feeder signal receiving angle according to claim 5, it is characterised in that：Institute There is the head rod（3a）With the body of rod（1）Axis centered on line angularly poor arrangement, all second connecting rods （3b）With the body of rod（1）Axis centered on line angularly poor arrangement.
- A kind of 7. only pipe tower with regulation antenna feeder signal receiving angle according to claim 1, it is characterised in that：Institute State the body of rod（1）Middle epimere be provided with control cabinet（5）, control cabinet（5）Inside it is provided with controller（5a）With signal strength detection instrument, Motor（4a）With signal strength detection instrument and controller（5a）It is electrically connected with, all tabular antenna feeders（2a）And signal Intensity detector communication connection.
- A kind of 8. only pipe tower with regulation antenna feeder signal receiving angle according to claim 1, it is characterised in that：Institute State the body of rod（1）Epimere be installed with lightning rod（6）, lightning rod（6）It is vertically arranged, lightning rod（6）Bottom be electrically connected with There are arrester, arrester ground.
- A kind of 9. only pipe tower with regulation antenna feeder signal receiving angle according to claim 1, it is characterised in that：Institute State fixed cylinder（4d）Flanging（4d2）Bottom be provided with sealing ring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003726.0A CN107587774B (en) | 2017-10-24 | 2017-10-24 | single-tube tower with function of adjusting antenna feeder signal receiving angle |
| CN201910830201.7A CN110512937B (en) | 2017-10-24 | 2017-10-24 | Method for adjusting antenna feeder signal receiving angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003726.0A CN107587774B (en) | 2017-10-24 | 2017-10-24 | single-tube tower with function of adjusting antenna feeder signal receiving angle |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910830201.7A Division CN110512937B (en) | 2017-10-24 | 2017-10-24 | Method for adjusting antenna feeder signal receiving angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107587774A true CN107587774A (en) | 2018-01-16 |
| CN107587774B CN107587774B (en) | 2019-12-06 |
Family
ID=61044217
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711003726.0A Active CN107587774B (en) | 2017-10-24 | 2017-10-24 | single-tube tower with function of adjusting antenna feeder signal receiving angle |
| CN201910830201.7A Active CN110512937B (en) | 2017-10-24 | 2017-10-24 | Method for adjusting antenna feeder signal receiving angle |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910830201.7A Active CN110512937B (en) | 2017-10-24 | 2017-10-24 | Method for adjusting antenna feeder signal receiving angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107587774B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987457A (en) * | 2020-09-30 | 2020-11-24 | 陈欣 | Antenna equipment for 5G communication base station |
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| CN201570583U (en) * | 2009-11-02 | 2010-09-01 | 中国移动通信集团江苏有限公司 | Device for adjusting angle of antenna |
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| KR101455691B1 (en) * | 2013-06-03 | 2014-11-04 | 블루엔이(주) | Antenna fixture for adjusting installed direction |
| CN107086372A (en) * | 2017-06-02 | 2017-08-22 | 马鞍山九致信息科技有限公司 | A kind of angle steel tower with aerial angle regulatory function |
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| CN201725876U (en) * | 2010-04-19 | 2011-01-26 | 长沙威佳电子科技有限公司 | Angle self-adjusting system for communication antenna |
| CN203716599U (en) * | 2014-01-13 | 2014-07-16 | 嘉兴职业技术学院 | Tower body of communication tower |
| KR102254004B1 (en) * | 2014-12-26 | 2021-05-20 | 주식회사 케이엠더블유 | Antenna apparatus |
| US9972906B2 (en) * | 2015-01-15 | 2018-05-15 | Outthink Technologies, Llc | Two-way antenna mounting bracket and assembly with independently adjustable electromechanical antenna tilt and azimuthal steering for beam reshaping |
| CN106337596B (en) * | 2016-08-25 | 2018-09-14 | 杭州德宝机电制造有限公司 | Adjustable pole communicates shaft tower |
| CN106654510B (en) * | 2016-11-04 | 2024-02-20 | 中国电子科技集团公司第五十四研究所 | Large-working-space variable-drive parallel antenna pedestal mechanism |
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- 2017-10-24 CN CN201910830201.7A patent/CN110512937B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201570583U (en) * | 2009-11-02 | 2010-09-01 | 中国移动通信集团江苏有限公司 | Device for adjusting angle of antenna |
| CN203071233U (en) * | 2012-12-13 | 2013-07-17 | 浙江八方电信有限公司 | Directive antenna of base station and remote antenna adjusting system having the same |
| CN103078184A (en) * | 2013-02-01 | 2013-05-01 | 江苏捷诚车载电子信息工程有限公司 | Plate-like antenna adjustment device |
| KR101455691B1 (en) * | 2013-06-03 | 2014-11-04 | 블루엔이(주) | Antenna fixture for adjusting installed direction |
| CN107086372A (en) * | 2017-06-02 | 2017-08-22 | 马鞍山九致信息科技有限公司 | A kind of angle steel tower with aerial angle regulatory function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111987457A (en) * | 2020-09-30 | 2020-11-24 | 陈欣 | Antenna equipment for 5G communication base station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107587774B (en) | 2019-12-06 |
| CN110512937B (en) | 2020-10-16 |
| CN110512937A (en) | 2019-11-29 |
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Effective date of registration: 20191111 Address after: Room 1312, information building, No. 13, Linyin North Street, Pinggu District, Beijing Applicant after: Beijing Jinghangan Airport Engineering Co., Ltd. Address before: 264013 space Road, Yantai hi tech Zone, Shandong Province, No. 7 Applicant before: Duan Zunhu |
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