CN109914265A - A kind of erection crane - Google Patents
A kind of erection crane Download PDFInfo
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- CN109914265A CN109914265A CN201910303248.8A CN201910303248A CN109914265A CN 109914265 A CN109914265 A CN 109914265A CN 201910303248 A CN201910303248 A CN 201910303248A CN 109914265 A CN109914265 A CN 109914265A
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- erection crane
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Abstract
The present invention relates to a kind of erection cranes, including load truss, the load truss includes travelling platform and hoisting platform, and the load truss further includes the walking mechanism with travelling platform one, and the walking mechanism includes walking track, walking oil cylinder, jacking apparatus and belt track wheel pedestal；The belt track wheel pedestal is connect with walking Orbit Matching, and the belt track wheel pedestal is fixedly mounted on the bottom of travelling platform；The walking oil cylinder is located between travelling platform and walking track, and the both ends of the walking oil cylinder are connect with walking track and travelling platform respectively；The jacking apparatus is fixedly mounted on travelling platform bottom, for jacking up travelling platform.Complete machine of the present invention eliminates supporting mechanism, and walking support one is supported directly on walking track, and load directly passes through walking mechanism and passes to bridge floor, and bearing area is big, structure is simple, operation is more convenient.
Description
Technical field
The invention belongs to technical field of bridge construction, are related to a kind of erection crane, in particular to it is a kind of for set up greatly across
Spend the erection crane of the prefabricated girder segment of overpass.
Background technique
With the progress of bridge construction technique, bridge construction technique becomes modernizing prefabricated via traditional cast-in-place construction
Assembling construction.The disadvantage of traditional cast-in-place construction: (1) construction period is long, and construction quality is not easy to control；(2) prestressed concrete beam
Since stress loss caused by shrinking, creeping is bigger；(3) bracket in construction, template consumption are big, and operating expenses is high；(4)
It sets up bracket influence drain off floodwaters, open the navigation or air flight, construction period may be by the threat of flood and drift.Modernize precast assembly construction
Advantage: (1) factory makes, and component quality and size essence are reliably guaranteed；(2) Yi Shixian mechanized construction；(3) upper and lower part
Structure can parallel operations, thus the live duration can be shortened；(4) construction workload greatly reduces, and reduces engineering therefrom and make
Valence；(5) since speed of application is fast, it is applicable to urgent construction work；(6) by after element precast due to store a period of time,
Therefore has certain age during installation, deformation caused by can reducing due to concrete shrinkage, creeping.Since precast assembly is constructed
Mode has great advantage, more meets the modernization infrastructure requirement of safe and efficient, economic, low influence, just gradually replaces
Traditional full framing or the cast-in-place form of construction work of Hanging Basket.Erection crane exactly comes into being in this context, as special frame
If equipment.
Generally existing following problems are hung for setting up the bridge floor of overpass currently on the market: (1) mostly using the carbons such as Q235B
Structural steel production, plate are welded into the form of box beam, and the strength of materials is low, and plate thickness is thicker, and welding capacity is big, manufacture cumbersome, size
Low precision, from great；(2) design separated using supporting mechanism and walking mechanism, structure is complicated, at high cost, cumbersome, right
The Support Position of bridge floor requires very high；(3) luffing and transverse-moving mechanism use the form of single-beam, and stability is poor；(4) luffing and traversing
At independent, platform lacks adjustment capability for mechanism and tensioning Platform Designing, and when hanging beam easily leads to segment and tensioning platform collides, or
It is that tensioning position is not well positioned to meet tensioning need of work；(5) anchoring is using fixed design, does not have longitudinally, laterally two
A direction freely adjusts, and pre-buried to bridge and lifting hole(eyelet) dimension precision requirement is very high, easily position is caused to mismatch；(6) long
When time drop in beam, hoist engine braking is still relied on, risk factor is high；(7) using relay control, configure it is complicated, erroneous for installation,
Reliability is low, poor anti jamming capability, repairs hardly possible.For the bridge construction technique for adapting to modernization, overpass bridge floor, which is hung, to be met
Following characteristics: (1) stability is good, safety coefficient is high；(2) small to the load of bridge from heavy and light；(3) structurally reasonable, matching is wanted
Ask low；(4) easy to operate, integrated height；(5) versatile, maintenance, transformation are convenient.
Summary of the invention
The purpose of the present invention is to provide a kind of erection crane, it is mainly used for solving bridge floor in the prior art and hangs supporting mechanism
The problem of separating bring with walking mechanism structure is complicated.
To achieve the above object, the technical solution used in the present invention is:
A kind of erection crane, including load truss, the load truss include travelling platform and hoisting platform, and feature exists
In: the load truss further includes the walking mechanism with travelling platform one, and the walking mechanism includes walking track, walking oil
Cylinder, jacking apparatus and belt track wheel pedestal；The belt track wheel pedestal is connect with walking Orbit Matching, the belt track wheel pedestal
It is fixedly mounted on the bottom of travelling platform；The walking oil cylinder is located between travelling platform and walking track, the walking oil cylinder
Both ends respectively with walking track and travelling platform connect；The jacking apparatus is fixedly mounted on travelling platform bottom, for pushing up
Play travelling platform.
Further, the walking track two sides are fluted, and the rail wheel of belt track wheel pedestal is located in the groove, when
Track of walking when travelling platform is jacked up also is sling by belt track wheel pedestal.
Further, the erection crane further includes transverse adjusting mechanism, for laterally adjusting travelling platform.
Further, the transverse adjusting mechanism includes sliding floor, and the sliding floor is equipped with adjusting nut and matches
The adjustment screw of set；One end of the adjustment screw is equipped with adjustment handle, and the other end is used to contact with the side of walking track.
Further, tackling system is additionally provided on the load truss, the tackling system includes derricking gear and lifting
Hoist engine, the hoisting winding are mounted on travelling platform；Wirerope on the hoisting winding, which successively bypasses, to be located at
The angle pulley and pulley blocks on platform are hung, end is fixed on hoisting platform；The fixed pulley group of the pulley blocks is located at lifting
On platform, running block is connect with derricking gear.
Further, the hoisting winding and matched angle pulley and pulley blocks have two sets.
Further, the hoisting platform is equipped with jib lubbing mechanism, and the fixed pulley group is mounted on jib lubbing mechanism.
Further, the jib lubbing mechanism includes the luffing sliding rail being mounted on hoisting platform and matches company with luffing sliding rail
The luffing sliding platform connect, the luffing sliding platform are driven by amplitude oil cylinder.
Further, the jib lubbing mechanism is equipped with transverse-moving mechanism, and the fixed pulley group is mounted on transverse-moving mechanism.
Further, the front end of the hoisting platform is also hung with operation hanging basket, passes through hanging basket at the top of the operation hanging basket
Translating rails are connect with hoisting platform, and the operation hanging basket is connected with luffing sliding platform by synchronous connecting rod and synchronous shifting
It is dynamic.
The invention has the benefit that
1, complete machine of the present invention eliminates supporting mechanism, and walking support one is supported directly on walking track, load is direct
Bridge floor is passed to by walking mechanism, bearing area is big, structure is simple, operation is more convenient.And low to bridge floor fundamental importance,
Structure is simple, movement is few, and each supporting point all uses flexural pivot form, can adapt to gradient support, avoids internal stress.
2, the present invention also specially devises transverse adjusting mechanism for walking mechanism, can conveniently adjust the appearance of track
State.
3, this erection crane is the operation hanging basket that complete machine specially devises tensioning operation, facilitates the tensioning operation of bridge, frame
If when closure segment, operation hanging basket is dismountable；It operates hanging basket and jib lubbing mechanism to link, prevents from lifting by crane prefabricated girder segment impact operations and hang
Basket.
Detailed description of the invention
Fig. 1 is stereoscopic schematic diagram one of the invention.
Fig. 2 is side schematic view of the invention.
Fig. 3 is stereoscopic schematic diagram two of the invention.
Fig. 4 is schematic rear view of the invention.
Fig. 5 is schematic top plan view of the invention.
Fig. 6 is front schematic view of the invention.
Fig. 7 is the arrangement schematic diagram one (side) of transverse adjusting mechanism in the present invention.
Fig. 8 is the arrangement schematic diagram two (front) of transverse adjusting mechanism in the present invention.
Fig. 9 is the partial enlargement diagram in Fig. 8 at transverse adjusting mechanism.
Figure 10 is the side schematic view when present invention uses.
Figure 11 is general illustration of the present invention in bridge construction.
Figure 12 is use state diagram one of the invention.
Figure 13 is use state diagram two of the invention.
Figure 14 is use state diagram three of the invention.
Figure 15 is use state diagram four of the invention.
Figure 16 is use state diagram five of the invention.
Figure 17 is use state diagram six of the invention.
Figure 18 is use state diagram seven of the invention.
In figure: travelling platform 110, stringer 111 of walking, crossbeam 112 of walking, fixed screw rod 113, hoisting platform 120, truss
Diagonal brace 130, truss upright-column 140,
Walking mechanism 200, track 201 of walking, oil cylinder 202 of walking, jacking apparatus 203, belt track wheel pedestal 204, track
Wheel 205,
Derricking gear 310 lifts by crane cross bar 311, lifts by crane vertical pole 312, connects sunpender 313, hoisting winding 320, wirerope
321, angle pulley 322, pulley blocks 323, jib lubbing mechanism 330, amplitude oil cylinder 331, luffing sliding platform 332, luffing sliding rail
333, traversing slide unit 334, transverse cylinder 335,
Transverse adjusting mechanism 400, sliding floor 401, adjusting nut 402, adjustment screw 403 adjust handle 404,
Operation hanging basket 510, hanging basket ontology 501, Telescopic suspension rod 502, hanging basket translating rails 503, synchronous connecting rod 504,
Control mechanism 600.
Specific embodiment
For a better understanding of the present invention, technical solution of the present invention is done further below with reference to embodiment and attached drawing
Explanation.
As shown in Figure 1, 2, a kind of erection crane designs maximum pulling capacity 70t, work range 1.5m~2.8m, including
Load truss (being main bearing structure), the load truss include travelling platform 110 and hoisting platform 120, the walking
It is connected between platform 110 and hoisting platform 120 by batter brace 130 and truss upright-column 140, forms a stable diamond shape knot
Structure (such as Fig. 2)；Truss upright-column 140 is equipped with ladder, is the auxiliary body that equipment is used and protected, personnel is facilitated to operate, prevent
It is unexpected to generate.And the tail portion of travelling platform 110 is equipped with Weighting system, improves the stability against overturning of complete machine zero load walking.Institute
Stating load truss further includes the walking shifting walk mechanism 200 with 110 one of travelling platform, and the walking mechanism 200 includes
Walking track 201, walking oil cylinder 202, jacking apparatus 203 and belt track wheel pedestal 204；The belt track wheel pedestal 204 and row
The matching connection of track 201 is walked, the belt track wheel pedestal 204 is fixedly mounted on the bottom of travelling platform 110；The walking oil cylinder
202 be located at travelling platform 110 and walking track 201 between, it is described walking oil cylinder 202 both ends respectively with walking track 201 and
Travelling platform 110 connects (hinged)；The jacking apparatus 203 (jack) is fixedly mounted on 110 bottom of travelling platform, for pushing up
It rises travelling platform 110 (jacking up entire erection crane).
As shown in figure 9,201 two sides of the walking track are fluted, the rail wheel 205 of belt track wheel pedestal 204 is located at institute
It states in groove, track 201 of walking when travelling platform 110 is jacked up also is sling by belt track wheel pedestal 204.
As shown in figure 3,110 tail end of travelling platform anchors (by fixed screw rod 113) with bridge floor after being expert at
Connection.
As shown in Fig. 7,8,9, the erection crane further includes transverse adjusting mechanism 400, for laterally adjusting travelling platform
110 (even if operations or laterally fine tuning that the machine can adapt to small curve bend), the both ends in 201 outside of walking track are respectively set
There is a transverse adjusting mechanism 400；The transverse adjusting mechanism 400 includes sliding floor 401 (being fixed on bridge floor when use),
The sliding floor 401 is equipped with adjusting nut 402 and matched adjustment screw 403；One end of the adjustment screw 403 is equipped with
Handle 404 is adjusted, the other end is used to contact with the side of walking track 201.
As shown in Fig. 2,5,6, it is additionally provided with tackling system on the load truss, is erection crane lifting and installation precast beam
The driving mechanism of segment；The tackling system includes (the motor use of hoisting winding 320 of derricking gear 310 and two JM7 types
Soft start, stable action, impact are small), two hoisting windings 320 are mounted on travelling platform 110 (tail portion)；Hoisting winding
Wirerope on 320 successively bypasses angle pulley 322 and (322 He of angle pulley of pulley blocks 323 on hoisting platform 120
Mating pulley blocks 323 are two sets), end is fixed on hoisting platform 120；The fixed pulley group of the pulley blocks 323 is located at lifting
On platform 120, running block is connect with derricking gear 310.
As shown in fig. 6, the derricking gear 310 includes by a lifting cross bar 311 (lifting 311 top of cross bar and with two
The connection of set running block) and two I-shape constructions for being fixedly connected into of lifting vertical pole 312, every is lifted by crane the both ends of vertical pole 312
One is respectively provided with for the connection sunpender 313 with prefabricated girder segment anchor connection.
As shown in Figure 1,5, the hoisting platform 120 is equipped with jib lubbing mechanism 330 (luffing amount 1.5m~2.8m), described fixed
Pulley blocks are mounted on jib lubbing mechanism 330.The jib lubbing mechanism 330 includes the luffing sliding rail 333 being mounted on hoisting platform 120
With the luffing sliding platform 332 for matching connection with luffing sliding rail 333, the luffing sliding platform 332 is driven by amplitude oil cylinder 331
Dynamic, the both ends of the amplitude oil cylinder 331 are connect with hoisting platform 120 and luffing sliding platform 332 respectively, for driving luffing sliding
Moving platform 332 moves on luffing sliding rail 333.
As shown in figure 5, the jib lubbing mechanism 330 is equipped with transverse-moving mechanism, the fixed pulley group is mounted on transverse-moving mechanism.
The transverse-moving mechanism includes traversing slide unit 334, and the traversing slide unit 334 is slidably mounted on luffing sliding platform 332, the cross
It moves slide unit 334 to drive by transverse cylinder 335, the both ends of the transverse cylinder 335 are slided with traversing slide unit 334 and luffing respectively
Platform 332 connects, for driving traversing slide unit 334 transverse shifting on luffing sliding platform 332.
As shown in Fig. 1,2,5, the front end of the hoisting platform 120 is also hung with operation hanging basket 510, the operation hanging basket
510 tops connect that (hanging basket translating rails 503 are fixedly mounted on hoisting platform with hoisting platform 120 by hanging basket translating rails 503
On 120), the operation hanging basket 510 is connect with luffing sliding platform 332 by synchronous connecting rod 504 and synchronizing moving；It is described
Operation hanging basket 510 is connect by Telescopic suspension rod 502 with hanging basket translating rails 503.
A kind of mode of operation of erection crane: being additionally provided with the control mechanism 600 for controlling complete machine on travelling platform 110,
It is equipped with remote control operation simultaneously, mainly uses remote control operation, convenient for segment lifting, adjustment, docking, while being provided with X-by-Wire
As spare, interlocked between two kinds of modes of operation.Complete machine uses mechanical, electrical, liquid integrated design, and the adjustment of mechanism is all made of
Hydraulic pushing, stable action, reliable, it is convenient to operate.In hoisting system, it is equipped with overload protection and height limiting device.Separately
Outside, equipment is also equipped with Gale warning instrument and various limit switches, while being equipped with emergency stop switch, effectively guarantees bridge floor
" safe and efficient " of loop wheel machine.Two sets of complete operation modes are divided into: wired handle operation, wireless remote control operation.Remote control is main
Mode of operation, in the case where ensuring has the good visual field, practical carries out commander's movement, and line traffic control is standby operation, two kinds of operations
It can switch over, and interlock between mode, avoid sending instruction simultaneously.Wired handle is made of 2 handles, and division of labor control is set
The movement of standby unloaded, heavily loaded two states.Line traffic control handle: 1# handle is for controlling unloaded displacement and adjustment, comprising: jacking, row
It walks, is traversing.2# handle is for controlling heavy duty installation and adjustment, comprising: crane lifting, luffing, horizontal tune, platform adjustment.Wireless remote
Control is operated with oneself by staff by 1 remote control transmitter sending action instruction, can cover the institute of 1#, 2# handle
It is functional, it is truly realized 1 people operation.
As shown in Figure 10-18, a kind of application method of erection crane:
(1) connection, lifting, the contraposition of prefabricated girder segment
Firstly, determining position of centre of gravity according to the center of gravity of prefabricated girder segment, then adjustment connects 313 position of sunpender and precast beam
Segment lifting hole matches and connects, and completes the connection of derricking gear and prefabricated girder segment；
Lifting is moved at the same time by 2 hoisting windings 320, and prefabricated girder segment is driven to be promoted, and after reaching assembled height, is passed through
Raising, luffing, horizontal tune adjust the space geometry state of prefabricated girder segment, and are simulated with the prefabricated girder segment set up
Matching docking, after reaching required precision, allows prefabricated girder segment to disengage a distance using luffing, and whole daub is simultaneously on interface
Finally spliced；
After the completion of docking, operation hanging basket 510 is adjacent to prefabricated girder segment, carries out symmetrical stretching construction using electric block, complete
At the lifting of prefabricated girder segment.
(2) walking shifts
After the completion of one precast beam segment lifting, equipment needs to be moved to next station, and the machine is using oil cylinder push-and-pull step
The walking displacement of shoe formula.Firstly, integrally jacking up erection crane by four sets of jacking apparatus 203, walking track 201 is allowed to be detached from bridge
Face is pulled out forward walking track 201 using walking oil cylinder 202 step by step, and then jacking apparatus 203 bounces back, and complete machine is fallen again
Onto walking track 201, travelling platform 110 is pushed to move forward in walking 201 previous step of track step also with jacking apparatus 203,
Reach designated position (walking backward identical as the principle walked forward).
(3) lateral erect-position adjustment
Erection crane is furnished with four sets of transverse adjusting mechanisms 400, by the way of spiral pushing tow, occurs for bend and walking
It is corrected when offset.Firstly, complete machine is lifted using jacking apparatus 203, be packed into sliding floor in the lower section of walking 201 end of track
401 and complete machine is transferred, then rotation adjustment handle 404 drives adjustment screw 403 to stretch out, and pushes complete machine on sliding floor 401
It is mobile, achieve the purpose that traversing adjustment, enables a device to the walking and the erect-position that adapt to bend.
As shown in Figure 10-18, a kind of erection crane use process in bridge construction:
(1) two main pier pier top has poured completion, and pre-buried anchoring；In two across inside mounting brackets of abutment pier；It hangs respectively
Four prefabricated girder segments are filled to be put on abutment pier bracket.
(2) it is symmetrically installed erection crane (two, each pier) in main pier pier top, and be anchored；
(3) erection crane debugging is normal；It opens operation hanging basket 510 and is pushed forward 0.3-0.5m；Prepare hanging beam；
(4) it symmetrically lifts the prefabricated girder segment of SP1: taking prefabricated girder segment under bridge, promoted to after mounting height, adjust precast beam
The geometry state of segment；
(5) after prefabricated girder segment position is adjusted, wet joint template is installed and is poured wet seam；
(6) after wet seam hardening, joint template is removed；
(7) erection crane moves forward, and reaches the end SP1 and fixes；
(8) same manner of execution is used, it is symmetrical to lift the segment SP2-SPn；
(9) before the lifting of last block, dismantling operation hanging basket 510 is answered, concedes lifting space；
(10) the prefabricated girder segment of last block is installed, after seam hardening, removes erection crane and end bay bracket, bridge frame
If completing.
Described above is only Application Example of the invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore according to equivalence changes made by scope of the present invention patent, still belongs to protection scope of the present invention.
Claims (10)
1. a kind of erection crane, including load truss, the load truss includes travelling platform (110) and hoisting platform (120),
It is characterized by: the load truss further includes and the walking mechanism (200) of travelling platform (110) one, the walking mechanism
It (200) include walking track (201), walking oil cylinder (202), jacking apparatus (203) and belt track wheel pedestal (204)；The band
Rail wheel pedestal (204) matches connection with walking track (201), and it is flat that the belt track wheel pedestal (204) is fixedly mounted on walking
The bottom of platform (110)；The walking oil cylinder (202) is located between travelling platform (110) and walking track (201), the walking
The both ends of oil cylinder (202) are connect with walking track (201) and travelling platform (110) respectively；The fixed peace of the jacking apparatus (203)
Mounted in travelling platform (110) bottom, for jacking up travelling platform (110).
2. a kind of erection crane according to claim 1, it is characterised in that: walking track (201) two sides are fluted,
The rail wheel (205) of belt track wheel pedestal (204) is located in the groove, track of walking when travelling platform (110) is jacked up
(201) it is also sling by belt track wheel pedestal (204).
3. a kind of erection crane according to claim 1, it is characterised in that: the erection crane further includes laterally adjusting machine
Structure (400), for laterally adjusting travelling platform (110).
4. a kind of erection crane according to claim 3, it is characterised in that: the transverse adjusting mechanism (400) includes sliding
Dynamic bottom plate (401), the sliding floor (401) are equipped with adjusting nut (402) and matched adjustment screw (403)；The tune
One end of whole screw rod (403) is equipped with adjustment handle (404), and the other end is used to contact with the side of walking track (201).
5. a kind of erection crane according to claim 1, it is characterised in that: be additionally provided with lifting system on the load truss
System, the tackling system include derricking gear (310) and hoisting winding (320), and hoisting winding (320) installation is expert at
It walks on platform (110)；Wirerope on the hoisting winding (320) successively bypasses the deflecting on hoisting platform (120)
Pulley (322) and pulley blocks (323), end are fixed on hoisting platform (120)；The fixed pulley group position of the pulley blocks (323)
In on hoisting platform (120), running block is connect with derricking gear (310).
6. a kind of erection crane according to claim 5, it is characterised in that: the hoisting winding (320) with it is matched
Angle pulley (322) and pulley blocks (323) have two sets.
7. a kind of erection crane according to claim 5, it is characterised in that: the hoisting platform (120) is equipped with luffing
Mechanism (330), the fixed pulley group are mounted on jib lubbing mechanism (330).
8. a kind of erection crane according to claim 7, it is characterised in that: the jib lubbing mechanism (330) includes being mounted on
Luffing sliding rail (333) on hoisting platform (120) and the luffing sliding platform (332) that connection is matched with luffing sliding rail (333), institute
Luffing sliding platform (332) is stated to be driven by amplitude oil cylinder (331).
9. a kind of erection crane according to claim 8, it is characterised in that: the jib lubbing mechanism (330) is equipped with traversing
Mechanism, the fixed pulley group are mounted on transverse-moving mechanism.
10. a kind of erection crane according to claim 8, it is characterised in that: also hang the front end of the hoisting platform (120)
Operation hanging basket (510) is hung with, is connected at the top of the operation hanging basket (510) by hanging basket translating rails (503) and hoisting platform (120)
It connects, the operation hanging basket (510) is connect with luffing sliding platform (332) by synchronous connecting rod (504) and synchronizing moving.
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| CN201910303248.8A CN109914265A (en) | 2019-04-16 | 2019-04-16 | A kind of erection crane |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526138A (en) * | 2019-07-31 | 2019-12-03 | 中铁九桥工程有限公司 | A kind of amplitude variation type erecting crane |
| CN110700104A (en) * | 2019-10-17 | 2020-01-17 | 中国十七冶集团有限公司 | Construction platform of suspension bridge suspender tensioning equipment and use method |
| CN113152306A (en) * | 2021-03-17 | 2021-07-23 | 中铁八局集团有限公司 | Small-radius large-gradient prefabricated T beam frame construction method |
| CN114108478A (en) * | 2021-11-30 | 2022-03-01 | 合建卡特工业股份有限公司 | Steel box and truss combined bridge deck crane support anchor system and walking method |
| CN116730184A (en) * | 2023-08-16 | 2023-09-12 | 四川蜀道建筑科技有限公司 | On-site construction pushes away and rises heavy system |
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| CN110526138A (en) * | 2019-07-31 | 2019-12-03 | 中铁九桥工程有限公司 | A kind of amplitude variation type erecting crane |
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| CN114108478A (en) * | 2021-11-30 | 2022-03-01 | 合建卡特工业股份有限公司 | Steel box and truss combined bridge deck crane support anchor system and walking method |
| CN114108478B (en) * | 2021-11-30 | 2024-02-23 | 中国铁建大桥工程局集团有限公司 | Steel box girder combined bridge deck crane supporting and anchoring system and walking method |
| CN116730184A (en) * | 2023-08-16 | 2023-09-12 | 四川蜀道建筑科技有限公司 | On-site construction pushes away and rises heavy system |
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Application publication date: 20190621 |