CN106002019A - Welding tractor used for continuous welding - Google Patents
Welding tractor used for continuous welding Download PDFInfo
- Publication number
- CN106002019A CN106002019A CN201610372509.8A CN201610372509A CN106002019A CN 106002019 A CN106002019 A CN 106002019A CN 201610372509 A CN201610372509 A CN 201610372509A CN 106002019 A CN106002019 A CN 106002019A
- Authority
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- China
- Prior art keywords
- axle
- unilateral bearing
- track
- track strip
- front axle
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 52
- 230000006835 compression Effects 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 24
- 230000033001 locomotion Effects 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 10
- 230000021615 conjugation Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 241000153246 Anteros Species 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0247—Driving means
Abstract
The invention relates to a welding tractor used for continuous welding. The welding tractor comprises a frame body (8) used for bearing a welding gun (9), a front axle (61) which is fixedly provided with a front wheel (6) and rotatably connected with the frame body (8) and a rear axle (51) which is fixedly provided with a rear wheel (5) and rotatably connected with the frame body (8), wherein a front axle first unidirectional bearing (62) and a front axle second unidirectional bearing (63) with opposite rotation directions are arranged in the axial direction of the front axle (61) at an intervals, a rear axle first unidirectional bearing (52) and a rear axle second unidirectional bearing (53) with opposite rotation directions are arranged in the axial direction of the rear axle (51) at an interval, a front driving wheel (111) is arranged on the front axle (61), the front driving wheel (111) is in power connection with a driving wheel (101) driven by a motor (100) by a front driving belt (211), and a rear driving wheel (121) is arranged on the rear axle (51).
Description
Technical field
The present invention relates to welding procedure field, be specially a kind of welding welding tractor continuously.
Background technology
In welding field especially continuous welding process, generally require to use and be attached with the welding tractor butt welded seam of welding gun and persistently weld.Shape residing for the weld seam of workpiece is different, welding tractor face upward before may experiencing horizontal path section, inclination angle in running upward trend line segment or inclination angle layback downhill path line segment.In each route segment, welding tractor all can carry out the direct of travel moved forward and backward.
But, due to the existence of these gradients, the control of the speed of service of welding tractor may be interfered.And, when the gradient is bigger, welding tractor is lost to be likely to result in due to the accident of power and is slipped the generation of the accidents such as car.And when the gradient is less, owing to the acceleration of gravity impact is likely to interfere gait of march.And the varying in size of the gradient, it affects difference.
Summary of the invention
It is an object of the invention to provide a kind of welding welding tractor continuously, it can overcome defect of the prior art.
nullAccording to the present invention，A kind of welding welding tractor continuously，Including for carrying the vehicle frame of welding gun and being installed with front-wheel the front axle being rotatably connected with described vehicle frame and be installed with trailing wheel the hind axle being rotatably connected with described vehicle frame，Described front axle is provided with usable rotational direction contrary front axle the first unilateral bearing and front axle the second unilateral bearing the most separatedly，Described hind axle is provided with usable rotational direction contrary rear axle the first unilateral bearing and rear axle the second unilateral bearing the most separatedly，It is additionally provided with front driving wheel on described front axle，Described front driving wheel is connected with by motor-driven drivewheel power by driving front band，It is additionally provided with rear drive sprocket on described hind axle，Described rear drive sprocket is also connected with by motor-driven drivewheel power by rear transmission band，Described motor is fixing with described vehicle frame to be connected，It is provided with electronic-controlled installation on the shell of described motor to electrically connect with described motor，Described electronic-controlled installation is in order to control the rotating speed of described motor，Such that it is able to control described front-wheel and the movement velocity of described trailing wheel as required，Described motor is connected with the storage battery being arranged on the described motor left side，Described accumulator electrically connects with the solar panels being arranged on described vehicle frame，It is connected between described accumulator with described solar panels and has inverter，Thus by described solar panels, solar energy is changed into electrical power storage and powers use for described motor in accumulator，The bottom of described vehicle frame is further fixedly arranged on and is perpendicular to the axial direction of described front axle and hind axle and the first track strip of longitudinal extension and the second track strip，Double wheel axle one-way brake slide block it is supported with slidably on described first track strip and the second track strip，The main part of described double wheel axle one-way brake slide block and extends longitudinally across described front axle and hind axle between axle the first unilateral bearing and rear axle the second unilateral bearing between described front axle the first unilateral bearing and front axle the second unilateral bearing in the rear，And be provided perpendicular at described front axle the first unilateral bearing anterior position longitudinal direction extend and bottom overcome in the front track of the first track strip the first track strip in front compression spring set towards described front axle the first unilateral bearing slidably front axle the first unilateral bearing braking protrude，At front axle the second unilateral bearing rear position, it is provided perpendicular to longitudinal direction extension and bottom overcomes the second track strip to protrude towards the braking of described front axle the second unilateral bearing slidably front axle the second unilateral bearing in front compression spring set in the front track of the second track strip，And at rear axle the first unilateral bearing anterior position, it is provided perpendicular to longitudinal direction extension and bottom overcomes the first track strip to protrude towards the braking of described rear axle the first unilateral bearing slidably rear axle the first unilateral bearing in rear compression spring set in the rear track of the first track strip，At the rear position of rear axle the second unilateral bearing, it is provided perpendicular to longitudinal direction extension and bottom overcomes the second track strip to protrude towards the braking of described rear axle the second unilateral bearing slidably rear axle the second unilateral bearing in rear compression spring set in the rear track of the second track strip，Thus，When the slope angle of the route advanced when workpiece is welded by described welding tractor makes described double wheel axle one-way brake slide block entirety slide backward，Described front axle the first unilateral bearing and rear axle the first unilateral bearing are protruded by the braking of described front axle the first unilateral bearing respectively and rear axle the first unilateral bearing brakes the conjugation protruded，So that described welding tractor in the direction of motion downward along slope angle by braking action，Braking action is not being had in the slope angle direction of motion upwards；When the slope angle of the route advanced when workpiece is welded by described welding tractor makes described double wheel axle one-way brake slide block entirety forward slip, described front axle the second unilateral bearing and rear axle the second unilateral bearing are protruded by the braking of described front axle the second unilateral bearing respectively and rear axle the second unilateral bearing brakes the conjugation protruded, so that described welding tractor in the direction of motion downward along slope angle by braking action, in the slope angle direction of motion upwards, there is no braking action；When the slope angle of the route advanced when stating welding tractor and welding workpiece is zero, described first track strip at front compression spring set, the second track strip at front compression spring set, the first track strip at rear compression spring set and the second track strip under the effect of rear compression spring set, described front axle the first unilateral bearing, front axle the second unilateral bearing, rear axle the first unilateral bearing and rear axle the second unilateral bearing do not engage with described double wheel axle one-way brake slide block and produce braking action.
Pass through such scheme, due to the brake silpper that is affected by gravity can under the effect of different slopes directions and different inclined degrees servo-actuated real estate lively state braking effect, and matched with brake silpper by unilateral bearing, can be freely-movable on the direction in opposite direction with braking motion, thus decrease the driving force loss of main driving direction, and do not interfere with the dynamic Control of this main driving direction.In particular, the loaded effect of increasing will not be produced for the driving force during going up a slope.And in approximate range in the horizontal direction, as long as less than certain angle of inclination, due to the existence of groups of springs, each braking position is all without the unilateral bearing on antero posterior axis produces braking action, thus run the motion of its fore-and-aft direction.Whole plant running is reliable, stabilized structure, it is possible to solve defect of the prior art very well.
Accompanying drawing explanation
Fig. 1 is the overlooking sectional structure schematic diagram of the continuous welding welding tractor of the present invention.
Fig. 2 is the sectional structure schematic diagram in the A-A direction in Fig. 1.
Fig. 3 is the sectional structure schematic diagram in the B-B direction in Fig. 1.
Detailed description of the invention
Referring to Fig. 1-3, embodiments of the invention are illustrated.
nullContinuous welding welding tractor according to embodiment includes the vehicle frame 8 for carrying welding gun 9 and is installed with front-wheel 6 front axle 61 being rotatably connected with described vehicle frame 8 and is installed with trailing wheel 5 hind axle 51 being rotatably connected with described vehicle frame 8，Described front axle 61 is provided with usable rotational direction contrary front axle the first unilateral bearing 62 and front axle the second unilateral bearing 63 the most separatedly，Described hind axle 51 is provided with usable rotational direction contrary rear axle the first unilateral bearing 52 and rear axle the second unilateral bearing 53 the most separatedly，It is additionally provided with front driving wheel 111 on described front axle 61，Described front driving wheel 111 is connected with drivewheel 101 power driven by motor 100 by driving front band 211，It is additionally provided with rear drive sprocket 121 on described hind axle 51，Described rear drive sprocket 121 is also connected with drivewheel 101 power driven by motor 100 by rear transmission band 221，Described motor 100 is fixing with described vehicle frame 8 to be connected，It is provided with electronic-controlled installation 95 on the shell of described motor 100 to electrically connect with described motor 100，Described electronic-controlled installation 95 is in order to control the rotating speed of described motor 100，Such that it is able to control described front-wheel 6 and the movement velocity of described trailing wheel 5 as required，Described motor 100 electrically connects with the accumulator 94 being arranged on described motor 100 left side，Described accumulator 94 electrically connects with the solar panels being arranged on described vehicle frame 8，It is connected between described accumulator 94 and described solar panels and has inverter，Thus by described solar panels, solar energy is changed into electrical power storage and powers use for described motor 100 in accumulator 94，The bottom of described vehicle frame 8 is further fixedly arranged on and is perpendicular to described front axle 61 and the axial direction of hind axle 51 and the first track strip 13 and the second track strip 24 of longitudinal extension，Double wheel axle one-way brake slide block 7 it is supported with slidably on described first track strip 13 and the second track strip 24，The main part 70 of described double wheel axle one-way brake slide block 7 is between described front axle the first unilateral bearing 62 and front axle the second unilateral bearing 63 and extends longitudinally across described front axle 61 and hind axle 51 in the rear between axle the first unilateral bearing 52 and rear axle the second unilateral bearing 53，And be provided perpendicular at described front axle the first unilateral bearing 62 anterior position longitudinal direction extend and bottom overcome in the front track 711 of the first track strip 13 first track strip in front compression spring set 712 towards described front axle the first unilateral bearing 62 slidably front axle the first unilateral bearing braking protrusion 71，At front axle the second unilateral bearing 63 rear position, it is provided perpendicular to longitudinal direction extension and bottom overcomes the second track strip to brake protrusion 72 in front compression spring set 722 towards described front axle the second unilateral bearing 63 slidably front axle the second unilateral bearing in the front track 721 of the second track strip 24，And at rear axle the first unilateral bearing 52 anterior position, it is provided perpendicular to longitudinal direction extension and bottom overcomes the first track strip to brake protrusion 73 in rear compression spring set 732 towards described rear axle the first unilateral bearing 52 slidably rear axle the first unilateral bearing in the rear track 731 of the first track strip 13，At the rear position of rear axle the second unilateral bearing 53, it is provided perpendicular to longitudinal direction extension and bottom overcomes the second track strip to brake protrusion 74 in rear compression spring set 742 towards described rear axle the second unilateral bearing 53 slidably rear axle the second unilateral bearing in the rear track 741 of the second track strip 24，Thus，When the slope angle of the route advanced when workpiece is welded by described welding tractor makes described double wheel axle one-way brake slide block 7 entirety slide backward，Described front axle the first unilateral bearing 62 and rear axle the first unilateral bearing 52 are protruded 71 and the conjugation of rear axle the first unilateral bearing braking protrusion 73 by the braking of described front axle the first unilateral bearing respectively，So that described welding tractor in the direction of motion downward along slope angle by braking action，Braking action is not being had in the slope angle direction of motion upwards；When the slope angle of the route advanced when workpiece is welded by described welding tractor makes described double wheel axle one-way brake slide block 7 overall forward slip, described front axle the second unilateral bearing 63 and rear axle the second unilateral bearing 53 are protruded 72 and the conjugation of rear axle the second unilateral bearing braking protrusion 74 by the braking of described front axle the second unilateral bearing respectively, so that described welding tractor in the direction of motion downward along slope angle by braking action, in the slope angle direction of motion upwards, there is no braking action；When the slope angle of the route advanced when stating welding tractor and welding workpiece is zero, described first track strip front compression spring set the 712, second track strip front compression spring set the 722, first track strip at rear compression spring set 732 and the second track strip under the effect of rear compression spring set 742, described front axle the first unilateral bearing 62, front axle the second unilateral bearing 63, rear axle the first unilateral bearing 52 and rear axle the second unilateral bearing 53 do not engage with described double wheel axle one-way brake slide block 7 and produce braking action.
Wherein, exemplary, the rear track 731 of front track 721, first track strip 13 of front track 711, second track strip 24 of the first track strip 13 and the rear track 741 of the second track strip 24 are dovetail groove or inverted T-slot.
Wherein, do not engage with described double wheel axle one-way brake slide block 7 at described front axle the first unilateral bearing 62, front axle the second unilateral bearing 63, rear axle the first unilateral bearing 52 and rear axle the second unilateral bearing 53 and produce in the state of braking action, the most described slope angle angle is in the range of the positive and negative certain amplitude of near zero, because the effect of groups of springs, it is by the gravity impact of opposing certain amplitude.
Due to the brake silpper that is affected by gravity can under the effect of different slopes directions and different inclined degrees servo-actuated real estate lively state braking effect, and matched with brake silpper by unilateral bearing, can be freely-movable on the direction in opposite direction with braking motion, thus decrease the driving force loss of main driving direction, and do not interfere with the dynamic Control of this main driving direction.In particular, the loaded effect of increasing will not be produced for the driving force during going up a slope.And in approximate range in the horizontal direction, as long as less than certain angle of inclination, due to the existence of groups of springs, each braking position is all without the unilateral bearing on antero posterior axis produces braking action, thus run the motion of its fore-and-aft direction.Whole plant running is reliable, stabilized structure, it is possible to solve defect of the prior art very well.
By with upper type, those skilled in the art can make various change according to mode of operation within the scope of the invention.
Claims (2)
- null1. a continuous welding welding tractor，Including the vehicle frame (8) for carrying welding gun (9) and be installed with front-wheel (6) the front axle (61) being rotatably connected with described vehicle frame (8) and be installed with trailing wheel (5) the hind axle (51) being rotatably connected with described vehicle frame (8)，Described front axle (61) is provided with usable rotational direction contrary front axle the first unilateral bearing (62) and front axle the second unilateral bearing (63) the most separatedly，Described hind axle (51) is provided with usable rotational direction contrary rear axle the first unilateral bearing (52) and rear axle the second unilateral bearing (53) the most separatedly，Front driving wheel (111) it is additionally provided with on described front axle (61)，Described front driving wheel (111) is connected with drivewheel (101) power driven by motor (100) by driving front band (211)，Rear drive sprocket (121) it is additionally provided with on described hind axle (51)，Described rear drive sprocket (121) is also connected with drivewheel (101) power driven by motor (100) by rear transmission band (221)，Described motor (100) is fixing with described vehicle frame (8) to be connected，It is provided with electronic-controlled installation (95) on the shell of described motor (100) to electrically connect with described motor (100)，Described electronic-controlled installation (95) is in order to control the rotating speed of described motor (100)，Such that it is able to control described front-wheel (6) and the movement velocity of described trailing wheel (5) as required，Described motor (100) electrically connects with the accumulator (94) being arranged on described motor (100) left side，Described accumulator (94) electrically connects with the solar panels being arranged on described vehicle frame (8)，It is connected between described accumulator (94) and described solar panels and has inverter，Thus by described solar panels, solar energy is changed into electrical power storage and uses for described motor (100) power supply in accumulator (94)，The bottom of described vehicle frame (8) is further fixedly arranged on and is perpendicular to described front axle (61) and the axial direction of hind axle (51) and first track strip (13) of longitudinal extension and the second track strip (24)，Double wheel axle one-way brake slide block (7) it is supported with slidably on described first track strip (13) and the second track strip (24)，The main part (70) of described double wheel axle one-way brake slide block (7) is between described front axle the first unilateral bearing (62) and front axle the second unilateral bearing (63) and extends longitudinally across described front axle (61) and hind axle (51) in the rear between axle the first unilateral bearing (52) and rear axle the second unilateral bearing (53)，And be provided perpendicular at described front axle the first unilateral bearing (62) anterior position longitudinal direction extend and bottom overcome in the front track (711) of the first track strip (13) the first track strip in front compression spring set (712) towards described front axle the first unilateral bearing (62) slidably front axle the first unilateral bearing braking protrude (71)，At front axle the second unilateral bearing (63) rear position, it is provided perpendicular to longitudinal direction extension and bottom overcomes the second track strip to protrude (72) in front compression spring set (722) towards the braking of described front axle the second unilateral bearing (63) slidably front axle the second unilateral bearing in the front track (721) of the second track strip (24)，And at rear axle the first unilateral bearing (52) anterior position, it is provided perpendicular to longitudinal direction extension and bottom overcomes the first track strip to protrude (73) in rear compression spring set (732) towards the braking of described rear axle the first unilateral bearing (52) slidably rear axle the first unilateral bearing in the rear track (731) of the first track strip (13)，At the rear position of rear axle the second unilateral bearing (53), it is provided perpendicular to longitudinal direction extension and bottom overcomes the second track strip to protrude (74) in rear compression spring set (742) towards the braking of described rear axle the second unilateral bearing (53) slidably rear axle the second unilateral bearing in the rear track (741) of the second track strip (24)，Thus，When the slope angle of the route advanced when workpiece is welded by described welding tractor makes described double wheel axle one-way brake slide block (7) entirety slide backward，Described front axle the first unilateral bearing (62) and rear axle the first unilateral bearing (52) are protruded (71) and the conjugation of rear axle the first unilateral bearing braking protrusion (73) by the braking of described front axle the first unilateral bearing respectively，So that described welding tractor in the direction of motion downward along slope angle by braking action，Braking action is not being had in the slope angle direction of motion upwards；When the slope angle of the route advanced when workpiece is welded by described welding tractor makes described double wheel axle one-way brake slide block (7) overall forward slip, described front axle the second unilateral bearing (63) and rear axle the second unilateral bearing (53) are protruded (72) and the conjugation of rear axle the second unilateral bearing braking protrusion (74) by the braking of described front axle the second unilateral bearing respectively, so that described welding tractor in the direction of motion downward along slope angle by braking action, in the slope angle direction of motion upwards, there is no braking action；When the slope angle of the route advanced when stating welding tractor and welding workpiece is zero, described first track strip at front compression spring set (712), the second track strip at front compression spring set (722), the first track strip at rear compression spring set (732) and the second track strip under the effect of rear compression spring set (742), described front axle the first unilateral bearing (62), front axle the second unilateral bearing (63), rear axle the first unilateral bearing (52) and rear axle the second unilateral bearing (53) do not engage with described double wheel axle one-way brake slide block (7) and produce braking action.
- 2. a kind of welding welding tractor continuously as claimed in claim 1, wherein, the rear track (741) of the front track (711) of the first track strip (13), the front track (721) of the second track strip (24), the rear track (731) of the first track strip (13) and the second track strip (24) is dovetail groove or inverted T-slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372509.8A CN106002019B (en) | 2016-05-31 | 2016-05-31 | A kind of continuous welding welding tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372509.8A CN106002019B (en) | 2016-05-31 | 2016-05-31 | A kind of continuous welding welding tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106002019A true CN106002019A (en) | 2016-10-12 |
| CN106002019B CN106002019B (en) | 2017-11-24 |
Family
ID=57092809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610372509.8A Active CN106002019B (en) | 2016-05-31 | 2016-05-31 | A kind of continuous welding welding tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106002019B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201154425Y (en) * | 2008-02-01 | 2008-11-26 | 北京石油化工学院 | Welding tractor with slide block type locking mechanism |
| CN201154424Y (en) * | 2008-02-01 | 2008-11-26 | 北京石油化工学院 | Locking mechanism for suspension button type welding tractor |
| CN201154426Y (en) * | 2008-02-01 | 2008-11-26 | 北京石油化工学院 | Walking device of friction drive type welding tractor |
| CN102873486A (en) * | 2012-09-14 | 2013-01-16 | 青岛东方铁塔股份有限公司 | Permanent magnet guide device for semi-automatic welding trolley |
| CN203091936U (en) * | 2013-02-27 | 2013-07-31 | 宝钢钢构有限公司 | Welding carriage with guiding tractor |
-
2016
- 2016-05-31 CN CN201610372509.8A patent/CN106002019B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201154425Y (en) * | 2008-02-01 | 2008-11-26 | 北京石油化工学院 | Welding tractor with slide block type locking mechanism |
| CN201154424Y (en) * | 2008-02-01 | 2008-11-26 | 北京石油化工学院 | Locking mechanism for suspension button type welding tractor |
| CN201154426Y (en) * | 2008-02-01 | 2008-11-26 | 北京石油化工学院 | Walking device of friction drive type welding tractor |
| CN102873486A (en) * | 2012-09-14 | 2013-01-16 | 青岛东方铁塔股份有限公司 | Permanent magnet guide device for semi-automatic welding trolley |
| CN203091936U (en) * | 2013-02-27 | 2013-07-31 | 宝钢钢构有限公司 | Welding carriage with guiding tractor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106002019B (en) | 2017-11-24 |
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Effective date of registration: 20201218 Address after: 313000 room 399, 5999 Wuxing Avenue, Zhili Town, Wuxing District, Huzhou City, Zhejiang Province (self declaration) Patentee after: HUZHOU JUYE INCUBATOR Co.,Ltd. Address before: 313000 No. 555, Ah Xiang Road, Zhili Town, Huzhou, Zhejiang Patentee before: HUIDA MACHINERY MANUFACTURING (HUZHOU) Co.,Ltd. |
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Effective date of registration: 20211009 Address after: 271000 high end talent entrepreneurship base in the middle of Nantianmen street, high tech Zone, Tai'an City, Shandong Province Patentee after: Taian Zhongquan Information Technology Co.,Ltd. Address before: 313000 room 399, No. 5999, Wuxing Avenue, Zhili Town, Wuxing District, Huzhou City, Zhejiang Province (self declaration) Patentee before: HUZHOU JUYE INCUBATOR Co.,Ltd. Effective date of registration: 20211009 Address after: 271000 Taishan science and Technology Industrial Park, north of yitianmen street, high tech Zone, Tai'an City, Shandong Province Patentee after: Taian wisdom Valley Industrial Park Operation Management Co.,Ltd. Address before: 271000 high end talent entrepreneurship base in the middle of Nantianmen street, high tech Zone, Tai'an City, Shandong Province Patentee before: Taian Zhongquan Information Technology Co.,Ltd. |
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