CN108442441A - A kind of road pavement roadbed construction equipment - Google Patents
A kind of road pavement roadbed construction equipment Download PDFInfo
- Publication number
- CN108442441A CN108442441A CN201810315426.4A CN201810315426A CN108442441A CN 108442441 A CN108442441 A CN 108442441A CN 201810315426 A CN201810315426 A CN 201810315426A CN 108442441 A CN108442441 A CN 108442441A
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- China
- Prior art keywords
- motor
- road pavement
- construction equipment
- shaft
- roadbed construction
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- 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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/16—Machines for digging other holes in the soil
- E02F5/20—Machines for digging other holes in the soil for vertical holes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
- E02F5/305—Arrangements for breaking-up hard ground
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention relates to road pavement technical fields,And disclose a kind of road pavement roadbed construction equipment,Including top plate,It is installed with mounting base at the top of the top plate,Motor is installed at the top of mounting base,The supporting table positioned at motor both sides is installed at the top of the mounting base,Montant is installed at the top of supporting table,Montant is installed with fender rod between the side opposite with motor,The both ends of the top plate are installed with buckle,Copper post is plugged on the outside of buckle,The one end of copper post far from buckle is installed with link block,The front surface of link block is plugged with hinged shaft,The outer sheath of hinged shaft is equipped with the side arm positioned at link block front surface,The one end of side arm far from hinged shaft is installed with protective housing,The intracavitary of protective housing is provided with servo motor,The agitating shaft through protective housing is installed with by shaft coupling at the output shaft of servo motor.Road pavement roadbed construction equipment, digging efficiency is high, easy to use.
Description
Technical field
The present invention relates to road pavement technical field, specially a kind of road pavement roadbed construction equipment.
Background technology
Road engineering refers to being engaged in an applied science and skill of the planning of road, exploration, design, construction and maintenance etc.
Art, is a branch of civil engineering, and road typically refers to as land transportation service, current various motor vehicles, Ren Xuli
Vehicle, the general designation for carrying the various roads for riding livestock and pedestrian on the back, road are divided into urban road, highway, factories and mines road, rural area by character of use
Road and forest road etc., city expres sway and highway are then that traffic discrepancy is controlled, the automobile run at high speed
Accommodation road.
Roadbed is both the main body of route and the basis on road surface and bears vehicular load jointly with road surface, and roadbed is disconnected by it
The digging situation of filling out in face is divided into embankment formula, road cutting type protecting and cut-fill three classes, and curb is area within the shoulder of road surface both sides,
It is used to supporting road surface, for interim parked vehicles or pedestrian's walking.
104620726 B of Chinese patent CN propose a kind of digging apparatus, which can the hole and deep according to required hole
Diameter replaces rapidly required tip of digging pit, and then carries out operation of digging pit, and has good structural behaviour, but the equipment makes
Used time can not take the soil in hole out of, and especially when roadbed is deeper, loose earth accumulation is in hole, not only
Reduce the efficiency of roadbed construction, it is also possible to stone hard in soil occur and block machinery, cause equipment impaired, increase economical
The problem of spending, so proposing a kind of road pavement solves the problems, such as above-mentioned propose with roadbed construction equipment.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of road pavement roadbed construction equipment, have roadbed and build
If the advantages that efficient, the soil in hole can not be taken out of by solving existing roadbed construction machinery, especially when roadbed compared with
When deep, loose earth accumulation not only reduces the efficiency of roadbed construction in hole, it is also possible to occur hard in soil
Stone blocks machinery, the problem of causing equipment impaired, increase financial expenditure.
(2) technical solution
To realize that the above-mentioned efficient purpose of roadbed construction, the present invention provide the following technical solutions：A kind of road pavement road
Base construction machines, including top plate are installed with mounting base at the top of the top plate, electricity are installed at the top of mounting base
Machine is installed with the supporting table positioned at motor both sides at the top of the mounting base, montant is installed at the top of supporting table,
Fender rod is installed between the montant side opposite with motor, the both ends of the top plate are installed with buckle, buckle
Outside be plugged with copper post, the one end of copper post far from buckle is installed with link block, and the front surface of link block is plugged with hinged shaft,
The outer sheath of hinged shaft is equipped with the side arm positioned at link block front surface, and the one end of side arm far from hinged shaft is installed with protective housing, prevents
The intracavitary of protecting box is provided with servo motor, and stirring through protective housing is installed with by shaft coupling at the output shaft of servo motor
Axis is mixed, the one end of agitating shaft far from servo motor output shaft is installed with metal box, and the intracavitary of metal box is provided with motor, horse
The both sides reached are both provided with the vibrating arm through metal box, and the one end of vibrating arm far from motor is installed with drill bit, the electricity
The shaft through top plate is installed with by shaft coupling at the output shaft of machine, peace is fixed in the one end of shaft far from motor output shaft
Equipped with connection bearing, the bottom for connecting bearing is installed with helical axis, and the outer sheath of helical axis carries native cylinder equipped with native cylinder is carried
Top is installed with the fixture block positioned at helical axis both sides, and cross bar is connected on the outside of fixture block, and the one end of cross bar far from fixture block is solid
Dingan County is equipped with connection sheet, and the native case of collection, the opposite fixed peace in side of two native casees of collection are installed on the outside of connection sheet
Equipped with the deflector being obliquely installed, the both sides for carrying native cylinder offer the unearthed hole above deflector, the spiral
It is provided on the outside of axis positioned at the spiral slice carried on the inside of native cylinder, the bottom for carrying native cylinder is installed with bottom set.
Preferably, shallow groove is offered at the top of the mounting base, the slot inner bottom wall of shallow groove is installed with rubber slab.
Preferably, two opposite sides of the montant offer fixing groove, and the slot inner bottom wall of fixing groove is fixedly mounted
There is sheet metal.
Preferably, it is installed with fixing buckle at the top of the link block, wire halyard is connected at the top of fixing buckle.
Preferably, the supporting table, montant and fender rod are one group, and quantity is two groups, is with the longitudinal midline of top plate
Axial symmetry is distributed.
Preferably, the intracavitary two side of the protective housing is installed with rubber pad, the top of the servo motor with
It is provided with sponge between the intracavitary roof of protective housing.
Preferably, the fender rod is rubber, and spring is provided on the outside of the fender rod.
Preferably, the top and bottom of the motor is installed with supporting rod, the two side of the motor and metal
There are gaps between case.
Preferably, the spiral slice is copper, and the surface of the spiral slice is provided with metal tines.
(3) advantageous effect
Compared with prior art, the present invention provides a kind of road pavement roadbed construction equipment, have following beneficial to effect
Fruit：
1, then road pavement roadbed construction equipment is connected by the way that side arm is arranged in the both sides for carrying native cylinder by side arm
Servo motor is connect, and drives the metal box cycle agitation equipped with motor, the drill bit being connect with vibrating arm also left and right agitation therewith is made
Soil layer is stirred, keeps soil property soft, send soil convenient for carrying native cylinder by heatable adobe sleeping platform, the pointed cone on the outside of drill bit at the cutting of ground when industry
Go out, it is easy to operate convenient for continuing to excavate downwards, it is efficient, facilitate staff's use.
2, road pavement roadbed construction equipment, by the native case of both sides setting collection for carrying native cylinder, being sliced by spiral
It takes soil out of, and enters the native case of collection from unearthed hole, when the native box installed of collection is full, equipment can be lifted by wire halyard, emptied
Soil in the native case of collection, device continuation digging operation, the soil in hole can be shifted effectively, facilitate to deeper again
Excacation, then by the surface that spiral is sliced be arranged metal tines, the hard stone mixed in soil can be hit
It is broken, the stuck machinery of stone is avoided, leads to engineering extension, improves digging efficiency, facilitates staff's use.
Description of the drawings
Fig. 1 is a kind of road pavement roadbed construction equipment sectional view proposed by the present invention；
Fig. 2 is that a kind of road pavement proposed by the present invention carries native cylinder sectional view with roadbed construction equipment.
In figure：1 top plate, 2 mounting bases, 3 motors, 4 supporting tables, 5 montants, 6 fender rods, 7 buckles, 8 copper posts, 9 link blocks, 10
Hinged shaft, 11 side arms, 12 protective housings, 13 servo motors, 14 agitating shafts, 15 metal boxes, 16 motors, 17 vibrating arms, 18 drill bits, 19 turns
Axis, 20 connection bearings, 21 helical axis, 22 fixture blocks, 23 cross bars, 24 connection sheets, the native casees of 25 collection, 26 deflectors, 27 carry native cylinder, 28 go out
Native hole, 29 spirals slice, 30 bottoms set.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, a kind of road pavement roadbed construction equipment, including top plate 1, the top of top plate 1 are fixedly mounted
There are mounting base 2, the top of mounting base 2 to offer shallow groove, the slot inner bottom wall of shallow groove is installed with rubber slab, mounting base 2
Top be installed with motor 3, the top of mounting base 2 is installed with the supporting table 4 positioned at 3 both sides of motor, supporting table 4
Top is installed with montant 5, and two opposite sides of montant 5 offer fixing groove, and the slot inner bottom wall of fixing groove fixes peace
Equipped with sheet metal, fender rod 6 is installed between montant 5 and the opposite side of motor 3, fender rod 6 is rubber, fender rod 6
Outside be provided with spring, supporting table 4, montant 5 and fender rod 6 are one group, and quantity is two groups, with the longitudinal midline of top plate 1
It is distributed for axial symmetry, the both ends of top plate 1 are installed with buckle 7, and the outside for buckling 7 is plugged with copper post 8, and copper post 8 is far from card
One end of button 7 is installed with link block 9, and the top of link block 9 is installed with fixing buckle, liter is connected at the top of fixing buckle
Cable wire drops, and the front surface of link block 9 is plugged with hinged shaft 10, and the outer sheath of hinged shaft 10 is equipped with the side arm positioned at 9 front surface of link block
11, the one end of side arm 11 far from hinged shaft 10 is installed with protective housing 12, and the intracavitary two side of protective housing 12 is installed with
Rubber pad is provided with sponge, the intracavitary setting of protective housing 12 between the top of servo motor 13 and the intracavitary roof of protective housing 12
There is a servo motor 13, the agitating shaft 14 through protective housing 12 be installed with by shaft coupling at the output shaft of servo motor 13,
The one end of agitating shaft 14 far from 13 output shaft of servo motor is installed with metal box 15, and the intracavitary of metal box 15 is provided with motor
16, the top and bottom of motor 16 is installed with supporting rod, there are gap between the two side and metal box 15 of motor 16,
The both sides of motor 16 are both provided with the vibrating arm 17 through metal box 15, and the one end of vibrating arm 17 far from motor 16 is installed with
Drill bit 18 is installed with the shaft 19 through top plate 1 at the output shaft of motor 3 by shaft coupling, and shaft 19 is defeated far from motor 3
One end of shaft is installed with connection bearing 20, and the bottom of connection bearing 20 is installed with helical axis 21, helical axis 21
Outer sheath is equipped with native cylinder 27 is carried, and the top for carrying native cylinder 27 is installed with the fixture block 22 positioned at 21 both sides of helical axis, fixture block 22
Outside is connected with cross bar 23, and the one end of cross bar 23 far from fixture block 22 is installed with connection sheet 24, and the outside of connection sheet 24 is fixed
The native case 25 of collection is installed, the opposite side of the native case 25 of two collection is installed with the deflector 26 being obliquely installed, carries native cylinder 27
Both sides offer the unearthed hole 28 above deflector 26, the outside of helical axis 21 is provided with positioned at carrying 27 inside of native cylinder
Spiral slice 29, spiral slice 29 be copper, spiral slice 29 surface be provided with metal tines, the bottom for carrying native cylinder 27 is fixed
Bottom set 30 is installed, by the way that side arm 11 is arranged in the both sides for carrying native cylinder 27, servo motor 13, and band are then connected by side arm 11
The dynamic cycle agitation of metal box 15 equipped with motor 16, also left and right stirs the drill bit 18 connect with vibrating arm 17 therewith, when operation
The pointed cone of heatable adobe sleeping platform at the cutting of ground, 18 outside of drill bit stirs soil layer, keeps soil property soft, sends out soil convenient for carrying native cylinder 27,
It is easy to operate convenient for continuing to excavate downwards, it is efficient, staff's use is facilitated, by being arranged in the both sides for carrying native cylinder 27
The native case 25 of collection is sliced 29 by spiral and takes soil out of, and enters the native case 25 of collection from unearthed hole 28, can when collection soil case 25 is filled
To lift equipment by wire halyard, the soil in collection soil case 25 is emptied, device continues digging operation again, can be effective
By the soil transfer in hole, the excacation to deeper is facilitated, then by the way that metal is arranged on the surface of spiral slice 29
Pointed tooth can smash the hard stone mixed in soil, avoid the stuck machinery of stone, lead to engineering extension, improve excavation
Efficiency facilitates staff's use.
When in use, soil layer is stirred pine by the pointed cone of the heatable adobe sleeping platform at the cutting of ground, 18 outside of drill bit, is kept soil property soft, is convenient for
Native cylinder 27 is carried to send out soil, it is easy to operate convenient for continuing to excavate downwards, it is efficient, facilitate staff's use.
In conclusion road pavement roadbed construction equipment, by the way that side arm 11 is arranged in the both sides for carrying native cylinder 27, then
Servo motor 13 is connected by side arm 11, and drives the cycle agitation of metal box 15 equipped with motor 16, is connect with vibrating arm 17
The also left and right agitation therewith of drill bit 18, heatable adobe sleeping platform, the pointed cone in 18 outside of drill bit stir soil layer at the cutting of ground when operation, make soil property
It is soft, soil is sent out convenient for carrying native cylinder 27, convenient for continuing to excavate downwards, easy to operate, efficient, facilitating staff makes
With by the native case 25 of both sides setting collection for carrying native cylinder 27, taking soil out of by spiral slice 29, and enter from unearthed hole 28 and collect
Native case 25 can be lifted equipment by wire halyard when collection soil case 25 is filled, and empty the soil in collection soil case 25, again
Device continues digging operation, can effectively shift the soil in hole, facilitate the excacation to deeper, then pass through
Metal tines are set on the surface of spiral slice 29, the hard stone mixed in soil can be smashed, avoid the stuck machine of stone
Tool leads to engineering extension, improves digging efficiency, facilitates staff's use, solves existing roadbed construction machinery not
Soil in hole can be taken out of, especially when roadbed is deeper, loose earth accumulation not only reduces road in hole
The efficiency that capital construction is set, it is also possible to stone hard in soil occur and block machinery, cause equipment impaired, increase asking for financial expenditure
Topic.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of road pavement roadbed construction equipment, including top plate (1), it is characterised in that：The top of the top plate (1) is fixed
Mounting base (2) is installed, motor (3) is installed at the top of mounting base (2), the top of the mounting base (2) is fixedly mounted
There is the supporting table (4) positioned at motor (3) both sides, montant (5), montant (5) and motor are installed at the top of supporting table (4)
(3) fender rod (6) is installed between opposite side, the both ends of the top plate (1) are installed with buckle (7), card
Copper post (8) is plugged on the outside of button (7), the one end of copper post (8) far from buckle (7) is installed with link block (9), link block
(9) front surface is plugged with hinged shaft (10), and the outer sheath of hinged shaft (10) is equipped with the side arm (11) positioned at link block (9) front surface,
The one end of side arm (11) far from hinged shaft (10) is installed with protective housing (12), and the intracavitary of protective housing (12) is provided with servo motor
(13), the agitating shaft (14) through protective housing (12) is installed with by shaft coupling at the output shaft of servo motor (13), stirred
It mixes the one end of axis (14) far from servo motor (13) output shaft and is installed with metal box (15), the intracavitary setting of metal box (15)
There are motor (16), the both sides of motor (16) to be both provided with the vibrating arm (17) through metal box (15), vibrating arm (17) is far from horse
It is installed with drill bit (18) up to the one end of (16), is installed with and is run through by shaft coupling at the output shaft of the motor (3)
The shaft (19) of top plate (1), the one end of shaft (19) far from motor (3) output shaft are installed with connection bearing (20), connection
The bottom of bearing (20) is installed with helical axis (21), and the outer sheath of helical axis (21) carries native cylinder equipped with native cylinder (27) is carried
(27) fixture block (22) positioned at helical axis (21) both sides is installed at the top of, fixture block is connected with cross bar on the outside of (22)
(23), the one end of cross bar (23) far from fixture block (22) is installed with connection sheet (24), and the outside of connection sheet (24) is fixedly mounted
There are the native case (25) of collection, two opposite sides of the native case (25) of collection to be installed with the deflector (26) being obliquely installed, institute
It states and carries the both sides of native cylinder (27) and offer unearthed hole (28) above deflector (26), the outside of the helical axis (21)
It is provided with positioned at the spiral slice (29) carried on the inside of native cylinder (27), the bottom for carrying native cylinder (27) is installed with bottom set
(30)。
2. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The mounting base (2)
Top offer shallow groove, the slot inner bottom wall of shallow groove is installed with rubber slab.
3. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：Two montants
(5) opposite side offers fixing groove, and the slot inner bottom wall of fixing groove is installed with sheet metal.
4. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The link block (9)
Top be installed with fixing buckle, be connected with wire halyard at the top of fixing buckle.
5. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The supporting table (4),
Montant (5) and fender rod (6) are one group, and quantity is two groups, is distributed by axial symmetry of the longitudinal midline of top plate (1).
6. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The protective housing (12)
Intracavitary two side be installed with rubber pad, the top of the servo motor (13) and the intracavitary roof of protective housing (12) it
Between be provided with sponge.
7. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The fender rod (6)
For rubber, spring is provided on the outside of the fender rod (6).
8. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The motor (16)
Top and bottom is installed with supporting rod, and there are gaps between the two side and metal box (15) of the motor (16).
9. a kind of road pavement roadbed construction equipment according to claim 1, it is characterised in that：The spiral slice
(29) it is copper, the surface of the spiral slice (29) is provided with metal tines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315426.4A CN108442441B (en) | 2018-04-10 | 2018-04-10 | Road is laid and is used road bed construction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315426.4A CN108442441B (en) | 2018-04-10 | 2018-04-10 | Road is laid and is used road bed construction equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108442441A true CN108442441A (en) | 2018-08-24 |
| CN108442441B CN108442441B (en) | 2021-03-23 |
Family
ID=63199577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810315426.4A Expired - Fee Related CN108442441B (en) | 2018-04-10 | 2018-04-10 | Road is laid and is used road bed construction equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108442441B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737878A (en) * | 2022-04-15 | 2022-07-12 | 成蜀电力集团有限公司 | Portable detachable movable rotary digging device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172911A (en) * | 1999-12-14 | 2001-06-26 | Kayaba Ind Co Ltd | Digging cutter and device |
| KR20120051142A (en) * | 2010-11-12 | 2012-05-22 | 주식회사 대창중기계 | Drilling rod attaching screw wing and mixing blade and multiaxial earth auger machine using it |
| CN105735889A (en) * | 2014-12-06 | 2016-07-06 | 黑龙江宏宇电站设备有限公司 | Three-handle pit-picker used for power station and pit digging method |
| CN206635841U (en) * | 2017-03-28 | 2017-11-14 | 中交第一航务工程局有限公司 | A kind of automatic excavation and construction device for deep foundation ditch |
| CN206743829U (en) * | 2017-02-24 | 2017-12-15 | 庞九华 | A kind of gardens pit-picker |
-
2018
- 2018-04-10 CN CN201810315426.4A patent/CN108442441B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172911A (en) * | 1999-12-14 | 2001-06-26 | Kayaba Ind Co Ltd | Digging cutter and device |
| KR20120051142A (en) * | 2010-11-12 | 2012-05-22 | 주식회사 대창중기계 | Drilling rod attaching screw wing and mixing blade and multiaxial earth auger machine using it |
| CN105735889A (en) * | 2014-12-06 | 2016-07-06 | 黑龙江宏宇电站设备有限公司 | Three-handle pit-picker used for power station and pit digging method |
| CN206743829U (en) * | 2017-02-24 | 2017-12-15 | 庞九华 | A kind of gardens pit-picker |
| CN206635841U (en) * | 2017-03-28 | 2017-11-14 | 中交第一航务工程局有限公司 | A kind of automatic excavation and construction device for deep foundation ditch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737878A (en) * | 2022-04-15 | 2022-07-12 | 成蜀电力集团有限公司 | Portable detachable movable rotary digging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108442441B (en) | 2021-03-23 |
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Effective date of registration: 20210308 Address after: No.88 shijiadai, Xiagang street, Jiangyin City, Wuxi City, Jiangsu Province, 214000 Applicant after: Jiangyin Gangcheng Municipal Engineering Co.,Ltd. Address before: No.232 Anyang Road, Ruian City, Wenzhou City, Zhejiang Province Applicant before: Qi Quan |
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