CN209324109U - A kind of portable steel tower of emergency guarantee - Google Patents

A kind of portable steel tower of emergency guarantee Download PDF

Info

Publication number
CN209324109U
CN209324109U CN201821757323.5U CN201821757323U CN209324109U CN 209324109 U CN209324109 U CN 209324109U CN 201821757323 U CN201821757323 U CN 201821757323U CN 209324109 U CN209324109 U CN 209324109U
Authority
CN
China
Prior art keywords
tower
section
stabilizer blade
supporting leg
tower body
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.)
Active
Application number
CN201821757323.5U
Other languages
Chinese (zh)
Inventor
路赓明
裴春生
刘鹏举
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanzhou Branch Of China Iron Tower Co Ltd
Original Assignee
Lanzhou Branch Of China Iron Tower Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lanzhou Branch Of China Iron Tower Co Ltd filed Critical Lanzhou Branch Of China Iron Tower Co Ltd
Priority to CN201821757323.5U priority Critical patent/CN209324109U/en
Application granted granted Critical
Publication of CN209324109U publication Critical patent/CN209324109U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a kind of portable steel towers of emergency guarantee, including supporting column foot, clump weight, tower body and lightning rod, column foot is supported to include at least three stabilizer blades and ring flange pedestal, three stabilizer blades are located on the surrounding of ring flange pedestal, stabilizer blade can try to get to the heart of a matter seat rotation relative to flange to be unfolded or pack up, clump weight is pressed on each stabilizer blade of support column foot, tower body includes lower support section, intermediate tower section and antenna construction section, pass through flanged joint between each section of tower body, the top of lower support section is connected by diagonal brace with the outer end of stabilizer blade, tower body is vertically equipped with several ladder supporting legs at a certain distance, the lower end of lightning rod is fixed on the upper end of third tower by flange, lightning rod is grounded by lightning protection downlead.The utility model can be carried manually, on-site assembly, be carried and easy to assembly, and burst fire-disaster and the guarantee of material items emergency communication are suitable for.

Description

A kind of portable steel tower of emergency guarantee
Technical field
The utility model relates to communications facility technical fields, and in particular to a kind of portable steel tower of emergency guarantee.
Background technique
Under normal conditions, when happening suddenly the major natural disasters such as earthquake, big flood, mud-rock flow, communication disruption, to accomplish quickly Response restores to communicate normally, ensures that disaster area communication is unaffected, and support personnel at the first time restore by the interior disaster-stricken place of arrival Normal communication, at present emergency communication ensure the Hen Duodao mainly based on communication support vehicle but by natural calamity Road vehicles are impassable, are difficult to accomplish that arriving at scene at the first time ensures communication, this thoroughly to solve the problems, such as, are badly in need of designing It can manually carry, communication by simple means tower easy to assembly, for burst fire-disaster and the guarantee of material items emergency communication.
Utility model content
For the defects in the prior art, the utility model provides a kind of portable steel tower of emergency guarantee, so that it can Artificial to carry, on-site assembly carries and easy to assembly, is suitable for burst fire-disaster and the guarantee of material items emergency communication.
The utility model provides a kind of portable steel tower of emergency guarantee, comprising: support column foot, the support column foot include At least three stabilizer blades and ring flange pedestal, at least three stabilizer blades are located on the surrounding of the ring flange pedestal and respectively along institutes Radially extending for ring flange pedestal is stated, it is one-to-one with the stabilizer blade that the bottom of the ring flange pedestal is provided at least three Stabilizer blade attachment base, the inner end of stabilizer blade and the stabilizer blade attachment base are rotatablely connected;Clump weight, the clump weight are pressed in the support tower On each stabilizer blade of foot;Tower body, the tower body include lower support section, intermediate tower section and antenna construction section, the lower support section It is erected on ring flange pedestal including the first tower at least three diagonal braces, first tower, the lower end of the first tower passes through Flange is fixed on ring flange pedestal, and the top of each first tower and the outer end of stabilizer blade are provided with diagonal brace seat, every institute It states on the diagonal brace seat on the diagonal brace seat and a stabilizer blade that the both ends of diagonal brace are bolted on respectively in the first tower;Institute Stating intermediate tower section includes several the second towers successively docked, and passes through flanged joint between two section of second adjacent tower, most lower The lower end of one section of second tower in face is fixed on the upper end of the first tower by flange;The antenna construction section includes third tower And it is located on the antenna holder around the third tower, the lower end of the third tower is fixed on uppermost by flange The upper end of one section of second tower;The tower body is vertically equipped with several ladder supporting legs at a certain distance;Lightning rod, it is described lightning-arrest The lower end of needle is fixed on the upper end of third tower by flange, and lightning rod is grounded by lightning protection downlead.
The portable steel tower of the emergency guarantee is made of support column foot, clump weight, tower body and lightning rod, can when carrying transport Each component is split, support column foot is packed up, and tower body splits into several segments, easy to carry in this way convenient for artificial carrying, when assembling, Place is flattened first, then each stabilizer blade for supporting column foot is unfolded clump weight is then pressed in support to install on the ground On each stabilizer blade of column foot, the first tower and diagonal brace of tower body lower support section are then assembled, then successively assembles each of intermediate tower section RRU device, is then mounted on antenna holder, finally pacifies by the second tower, the third tower of antenna construction section and antenna holder Lightning rod is filled, tower body can be climbed when assembling by ladder supporting leg, and entire assembling process only needs to connect bolt, is not necessarily to Electric welding, easy to assembly convenient for live man-made assembly, the portable steel tower of the emergency guarantee is suitable for burst fire-disaster and answers with material items Anxious communication ensures.
Further, it is provided with circular arc chamfering on the upside of the inner end of the stabilizer blade, the center of rotation of stabilizer blade to ring flange bottom The distance of bottom surface of seat and being equidistant to the inner end of stabilizer blade, and the distance is equal to the radius of the circular arc chamfering.Pass through this The design of sample, after supporting each supporting leg of column foot to be unfolded, the top surface of the medial segment of supporting leg is against the bottom surface of ring flange pedestal, to branch The rotation of leg is limited, so that support column foot stablizes support, when each supporting leg of column foot being supported to pack up, the inner face of supporting leg is against The bottom surface of ring flange pedestal is limited with the rotation to supporting leg, while being held together the supporting leg packed up with rope, is received in this way The supporting leg risen is fixed, easy to carry.
Further, the ladder supporting leg and tower body are rotatablely connected, and are corresponded to each ladder supporting leg on tower body and are additionally provided with branch Leg fixed frame, when ladder supporting leg is laid flat, the ladder supporting leg is supported under ladder supporting leg.Using such design, when carrying Each ladder supporting leg can be packed up, each ladder supporting leg is unfolded again when installation, such ladder supporting leg is not take up space in transport, just In carrying.
Further, in order to optimize structure, the ladder supporting leg is in U-shape, and two straightways of ladder supporting leg are clipped in tower body Two sides are simultaneously rotatablely connected with tower body.
Further, the top of the lower support section and every section of intermediate tower section is provided with fixed pulley assembly, described fixed Pulley assembly includes nut, screw rod, fixed pulley and handle, and the nut is fixed on the arc segment of ladder supporting leg, the axial direction of nut Along being arranged radially for tower body, the screw rod passes through the screw hole in nut and is threadedly coupled with the nut, and the fixed pulley can be rotated Ground is co-axially mounted by the outer end of screw rod, and the handle is fixed on screw rod inner end.Using such design, in the mistake of installation tower body Cheng Zhong, when needing feeding, rope bypasses fixed pulley, and material is tied up in one end of rope, and then the people on ground pulls rope The other end can promote the material of installation, and by the way that screw rod is arranged, when feeding, rotary screw rod stretches out fixed pulley, can prevent material Material is tangled when mentioning by ladder supporting leg, and in transport, can be rotated screw rod retracts fixed pulley, is not take up space, easy to carry.
Further, the antenna holder includes horizontal support bar, pole and fastener, the inner end of the horizontal support bar It is welded in third tower, the pole is removably mounted on the outer end of horizontal support bar by fastener.Pole is detachable, It is easy to remove to carry.
Further, the fastener includes pole mounting plate and U-clamp, and the pole mounting plate is welded on horizontally-supported The outer end of bar, the U-clamp cover on pole, and two straightways of U-clamp pass through pole mounting plate and are fixed on by nut and embraced On bar mounting plate.Using such design, it is easily installed pole.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar Element or part are generally identified by similar appended drawing reference.In attached drawing, each element or part might not be according to actual ratios It draws.
Fig. 1 is the structural schematic diagram of the utility model embodiment;
Fig. 2 is the bottom view of the bracket column foot of the utility model embodiment;
Fig. 3 is the A-A cross-sectional view of Fig. 2;
Fig. 4 is the scheme of installation of fixed pulley;
Fig. 5 is the scheme of installation of pole.
In attached drawing, 1 indicates support column foot;11 indicate stabilizer blade;12 expression flanges are tried to get to the heart of a matter seat;121 indicate stabilizer blade attachment base;2 Indicate clump weight;3 indicate tower body;31 indicate lower support section;311 indicate the first tower;312 indicate diagonal brace;313 indicate diagonal brace Seat;32 indicate intermediate tower section;321 indicate the second tower;33 indicate antenna construction section;331 indicate third tower;332 indicate day Line bracket;3321 indicate horizontal support bar;3322 indicate pole;3323 indicate pole mounting plate;3324 indicate U-clamp;34 tables Show ladder supporting leg;341 indicate supporting leg fixed frame;4 indicate lightning rod;5 indicate pulley assembly;51 indicate nut;52 indicate screw rod; 53 indicate fixed pulley;54 indicate handle.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to the present embodiment technical solution.Following embodiment is only used In clearly illustrating the technical solution of the present embodiment, therefore it is only used as example, and cannot be used as a limitation limitation the present embodiment Protection scope.
As Figure 1-Figure 5, the utility model embodiment provides a kind of portable steel tower of emergency guarantee, including support tower Foot 1, tower body 3, tower body 3 and lightning rod 4.
Support column foot 1 includes that at least three stabilizer blades 11 and ring flange pedestal 12, at least three stabilizer blades 11 are located on ring flange The surrounding of pedestal 12 and respectively radially extending along ring flange pedestal 12, the bottom of ring flange pedestal 12 be provided at least three with The one-to-one stabilizer blade attachment base 121 of stabilizer blade 11, the inner end of stabilizer blade 11 and stabilizer blade attachment base 121 are rotatablely connected.
In the present embodiment, circular arc chamfering (referring to Fig. 3), the rotation axis of stabilizer blade 11 are provided on the upside of the inner end of stabilizer blade 11 The heart is to the distance of the bottom surface of ring flange pedestal 12 and being equidistant to the inner end of stabilizer blade 11, and the distance is equal to circular arc chamfering Radius, after each supporting leg expansion of support column foot 1, the top surface of the medial segment of supporting leg is against the bottom surface of ring flange pedestal 12, to branch The rotation of leg is limited, so that support column foot 1 stablizes support, when each supporting leg of support column foot 1 is packed up, the inner face of supporting leg is supported It in the bottom surface of ring flange pedestal 12, is limited with the rotation to supporting leg, while being held together the supporting leg packed up with rope, this The supporting leg that sample is packed up is fixed, easy to carry.The supporting leg of the present embodiment is made of channel steel.
Clump weight 2 is pressed on each stabilizer blade 11 of support column foot 1, and clump weight 2 is arranged using groove plug-in type, according to different Weather environment, actual arrangement clump weight 2 can ensure the portable steel tower normal safe operation of the emergency guarantee.
Tower body 3 includes lower support section 31, intermediate tower section 32 and antenna construction section 33, and lower support section 31 includes the first tower Cylinder 311 and at least three diagonal braces 312, the first tower 311 are erected on ring flange pedestal 12, and the lower end of the first tower 311 passes through Flange is fixed on ring flange pedestal 12, and the top of each first tower 311 and the outer end of stabilizer blade 11 are provided with diagonal brace seat 313, The both ends of every diagonal brace 312 are bolted on respectively on the diagonal brace seat 313 and a stabilizer blade 11 in the first tower 311 Diagonal brace seat 313 on.Intermediate tower section 32 include several the second towers 321 successively docked, two section of second adjacent tower 321 it Between by flanged joint, the lower end of nethermost one section of second tower 321 is fixed on the upper end of the first tower 311 by flange, The height of tower body 3 can be adjusted by the joint number of intermediate tower section 32.Antenna construction section 33 includes that third tower 331 and ring are set The lower end of antenna holder 332 around third tower 331, third tower 331 is fixed on uppermost one section by flange The upper end of two towers 321, antenna holder 332 can meet the needs of three operator's antennas of installation, meet signal all standing.Tower body 3 are vertically equipped with several ladder supporting legs 34 at a certain distance, to facilitate climbing tower body 3.The lower end of lightning rod 4 is solid by flange It is scheduled on the upper end of third tower 331, lightning rod 4 is grounded by lightning protection downlead.
The portable steel tower of the emergency guarantee is made of support column foot 1, clump weight 2, tower body 3 and lightning rod 4, carries transport When, each component can be split, support column foot 1 is packed up, and tower body 3 splits into several segments, is carried in this way convenient for artificial, and it is easy to carry, When assembling, place is flattened first, then each stabilizer blade 11 of column foot 1 will be supported to be unfolded to install on the ground, then by counterweight Block 2 is pressed on each stabilizer blade 11 of support column foot 1, then assembles the first tower 311 and diagonal brace 312 of 3 lower support section 31 of tower body, Each second tower 321, the third tower 331 of antenna construction section 33 and the antenna holder 332 of intermediate tower section 32 are successively assembled again, so RRU device is mounted on antenna holder 332 afterwards, lightning rod 4 is finally installed, ladder supporting leg 34 can be passed through when assembling and climb tower Body 3, and entire assembling process only needs to connect bolt, without electric welding, convenient for live man-made assembly, easy to assembly, this is answered It is anxious to ensure that portable steel tower is suitable for burst fire-disaster and the guarantee of material items emergency communication.
Referring to Fig. 4, in the present embodiment, ladder supporting leg 34 and tower body 3 are rotatablely connected, and correspond to each ladder branch on tower body 3 Leg 34 is additionally provided with supporting leg fixed frame 341, and when ladder supporting leg 34 is laid flat, ladder supporting leg 34 is supported under ladder supporting leg 34, this Sample, when carrying, can pack up each ladder supporting leg 34, and when installation, each ladder supporting leg 34 was unfolded again, ladder supporting leg 34 in transport not Occupied space, it is easy to carry.Specifically, ladder supporting leg 34 is in U-shape, and two straightways of ladder supporting leg 34 are clipped in the two sides of tower body 3 And it is rotatablely connected with tower body 3.
In addition, the top of lower support section 31 and every section of intermediate tower section 32 is provided with fixed pulley assembly 5, fixed pulley assembly 5 include nut 51, screw rod 52, fixed pulley 53 and handle 54, and nut 51 is fixed on the arc segment of ladder supporting leg 34, the axis of nut 51 To being arranged radially along tower body 3, screw rod 52 passes through the screw hole in nut 51 and is threadedly coupled with the nut 51, and fixed pulley 53 can turn It being co-axially mounted dynamicly by the outer end of screw rod 52, handle 54 is fixed on 52 inner end of screw rod, in this way, during tower body 3 are installed, When needing feeding, rope bypasses fixed pulley 53, and material is tied up in one end of rope, and then the people on ground pulls the another of rope End, can promote the material of installation, and by the way that screw rod 52 is arranged, when feeding, rotary screw rod 52 stretches out fixed pulley 53, can prevent It is tangled when material mentions by ladder supporting leg 34, and in transport, can be rotated screw rod 52 retracts fixed pulley 53, is not take up space, just In carrying.
In the present embodiment, antenna holder 332 includes horizontal support bar 3321, pole 3322 and fastener, horizontally-supported The inner end of bar 3321 is welded in third tower 331, and pole 3322 is removably mounted on horizontal support bar by fastener 3321 outer end, it is easy to remove to carry in this way.Specifically, fastener includes pole mounting plate 3323 and U-clamp 3324, pole peace Loading board 3323 is welded on the outer end of horizontal support bar 3321,3324 sets of U-clamp on pole 3322, two straight lines of U-clamp 3324 Section passes through pole mounting plate 3323 and is fixed on pole mounting plate 3323 by nut 51, in this way, being easily installed pole 3322.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the present embodiment, rather than its limitations; Although the present embodiment is described in detail referring to foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or special to some or all of technologies Sign is equivalently replaced;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and the present embodiment is respectively implemented The range of example technical solution, should all cover in the claim of the present embodiment and the range of specification.

Claims (7)

1. a kind of portable steel tower of emergency guarantee characterized by comprising
Column foot is supported, the support column foot includes that at least three stabilizer blades and ring flange pedestal, at least three stabilizer blades are located on The surrounding of the ring flange pedestal and respectively radially extending along the ring flange pedestal, the bottom setting of the ring flange pedestal There are at least three and the one-to-one stabilizer blade attachment base of the stabilizer blade, the inner end of stabilizer blade and the stabilizer blade attachment base are rotatablely connected;
Clump weight, the clump weight are pressed on each stabilizer blade of the support column foot;
Tower body, the tower body include lower support section, intermediate tower section and antenna construction section, and the lower support section includes the first tower Cylinder and at least three diagonal braces, first tower are erected on ring flange pedestal, and the lower end of the first tower is fixed on by flange On ring flange pedestal, the top of each first tower and the outer end of stabilizer blade are provided with diagonal brace seat, and the two of the every diagonal brace It holds on the diagonal brace seat on the diagonal brace seat and a stabilizer blade being bolted in the first tower respectively;The intermediate tower section Including several the second towers successively docked, by flanged joint between two section of second adjacent tower, nethermost one section the The lower end of two towers is fixed on the upper end of the first tower by flange;The antenna construction section includes third tower and is located on The lower end of antenna holder around the third tower, the third tower is fixed on uppermost one section of second tower by flange The upper end of cylinder;The tower body is vertically equipped with several ladder supporting legs at a certain distance;
Lightning rod, the lower end of the lightning rod are fixed on the upper end of third tower by flange, and lightning rod passes through lightning protection downlead Ground connection.
2. the portable steel tower of emergency guarantee according to claim 1, which is characterized in that set on the upside of the inner end of the stabilizer blade It is equipped with circular arc chamfering, distance of the center of rotation to the bottom surface of ring flange pedestal of stabilizer blade and being equidistant for the inner end to stabilizer blade, And the distance is equal to the radius of the circular arc chamfering.
3. the portable steel tower of emergency guarantee according to claim 1, which is characterized in that the ladder supporting leg and tower body rotate It connects, corresponds to each ladder supporting leg on tower body and be additionally provided with supporting leg fixed frame, when ladder supporting leg is laid flat, the ladder supporting leg branch Support is under ladder supporting leg.
4. the portable steel tower of emergency guarantee according to claim 3, which is characterized in that the ladder supporting leg is in U-shape, ladder Two straightways of supporting leg are clipped in the two sides of tower body and are rotatablely connected with tower body.
5. the portable steel tower of emergency guarantee according to claim 4, which is characterized in that in the lower support section and every section Between the top of tower section be provided with fixed pulley assembly, the fixed pulley assembly includes nut, screw rod, fixed pulley and handle, described Nut is fixed on the arc segment of ladder supporting leg, being arranged radially axially along tower body of nut, and the screw rod passes through the spiral shell in nut The Kong Bingyu nut is threadedly coupled, and the fixed pulley is rotationally co-axially mounted by the outer end of screw rod, and the handle is fixed on Screw rod inner end.
6. the portable steel tower of emergency guarantee according to claim 1, which is characterized in that the antenna holder includes horizontal branch Strut, pole and fastener, the inner end of the horizontal support bar are welded in third tower, and the pole is removable by fastener It is mounted on the outer end of horizontal support bar with unloading.
7. the portable steel tower of emergency guarantee according to claim 6, which is characterized in that the fastener includes pole installation Plate and U-clamp, the pole mounting plate are welded on the outer end of horizontal support bar, and the U-clamp covers on pole, and the two of U-clamp Straightway passes through pole mounting plate and is fixed on pole mounting plate by nut.
CN201821757323.5U 2018-10-26 2018-10-26 A kind of portable steel tower of emergency guarantee Active CN209324109U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821757323.5U CN209324109U (en) 2018-10-26 2018-10-26 A kind of portable steel tower of emergency guarantee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821757323.5U CN209324109U (en) 2018-10-26 2018-10-26 A kind of portable steel tower of emergency guarantee

Publications (1)

Publication Number Publication Date
CN209324109U true CN209324109U (en) 2019-08-30

Family

ID=67708825

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821757323.5U Active CN209324109U (en) 2018-10-26 2018-10-26 A kind of portable steel tower of emergency guarantee

Country Status (1)

Country Link
CN (1) CN209324109U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110994408A (en) * 2019-12-31 2020-04-10 国网山东省电力公司龙口市供电公司 Power distribution pole
CN111741380A (en) * 2020-05-22 2020-10-02 浙江德宝通讯科技股份有限公司 Stable anti-overturning type roof beautifying antenna base station
CN115370218A (en) * 2022-09-02 2022-11-22 浙江八方电信有限公司 Communication tower with lightning rod frame lifting mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110994408A (en) * 2019-12-31 2020-04-10 国网山东省电力公司龙口市供电公司 Power distribution pole
CN111741380A (en) * 2020-05-22 2020-10-02 浙江德宝通讯科技股份有限公司 Stable anti-overturning type roof beautifying antenna base station
CN111741380B (en) * 2020-05-22 2022-03-15 浙江德宝通讯科技股份有限公司 Stable anti-overturning type roof beautifying antenna base station
CN115370218A (en) * 2022-09-02 2022-11-22 浙江八方电信有限公司 Communication tower with lightning rod frame lifting mechanism
CN115370218B (en) * 2022-09-02 2023-08-25 浙江八方电信有限公司 Communication tower with lightning rod frame elevating system

Similar Documents

Publication Publication Date Title
CN209324109U (en) A kind of portable steel tower of emergency guarantee
US20190123419A1 (en) Platform assemblies for radio transmission towers
WO2018028159A1 (en) External fixing device of protective net body, externally fixed protective net and application thereof
CN202094536U (en) Foldable rotary insulating platform
WO2017151990A1 (en) Containment shroud system
US4216636A (en) Tower
AU598668B2 (en) Framework forming support for a tent canvas of a light shelter
CN102361252B (en) Folding rotary insulating platform
US20120299796A1 (en) Module for Carrying Antennas of a Telecommunication System and Antenna Mast Arrangement
US9447601B2 (en) Portable environmental containment unit
US5033240A (en) Method and apparatus to enshroud large vertical structures
CN203626303U (en) Movable lifting-type emergency communication device
CN112216953A (en) Chain type hoop platform for communication system
CN101914999A (en) Communication device for fast integrating integrative machine room
US11462813B2 (en) Antenna tower platform assembly
US2356085A (en) Radio antenna mast
CN208706839U (en) A kind of communication base station antenna mounting device
CN203722126U (en) High voltage line bird repeller installation tool
CN205626783U (en) Novel portable safety takes stores pylon
CN108411805B (en) Quick-laying helicopter apron unit and apron
CN205921086U (en) Antenna angle modulation device
CN201778510U (en) Rapid integrated communication device of integral computer room
US20040226594A1 (en) Children's play area sunshade canopy
CN107887682B (en) Communication holding pole for high-speed cross-sea bridge and construction method thereof
CN105173113B (en) Test bed of aircraft fuel system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant