CN109097904A - A kind of large circle machine - Google Patents
A kind of large circle machine Download PDFInfo
- Publication number
- CN109097904A CN109097904A CN201810576390.5A CN201810576390A CN109097904A CN 109097904 A CN109097904 A CN 109097904A CN 201810576390 A CN201810576390 A CN 201810576390A CN 109097904 A CN109097904 A CN 109097904A
- Authority
- CN
- China
- Prior art keywords
- dust
- wheel
- yarn
- large circle
- circle machine
- 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.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/32—Devices for removing lint or fluff
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/22—Devices for preparatory treatment of threads
- D04B35/24—Devices for preparatory treatment of threads by moistening or lubricating
Abstract
The present invention is a kind of large circle machine, and rack is equipped with yarn gear unit and weaving body;Rack two sides are equipped with bobbin loader, are connected with multiple drums on bobbin loader;The yarn gear unit includes driving motor, is connected with driving wheel by driving shaft on driving motor, and driving wheel passes through two-stage and is sequentially connected line sending unit.Dedusting collection device is equipped between body and yarn gear unit, including dust-proofing ring, scraping article, sweep-up pipe, dust absorption fan and dust collecting container, the dust-proofing ring are set on table top, and multiple dust removal ports are provided on side wall;The scraping article is fixed on turntable side wall;The sweep-up pipe include general pipeline and it is multiple be in charge of, multiple described being in charge of connect one to one with dust removal port;The dust absorption fan is connected to general pipeline;The dust collecting container is connected to the rear end of dust absorption fan, and rear end offers multiple through-holes, and the present invention can not only improve transmission stability, prevents yarn broken string, abrasion, also has efficient dust suction dust removing effects.
Description
Technical field
The present invention relates to textile machine, especially a kind of large circle machine.
Background technique
Existing large circle machine is usually to send the yarn on multiple drums on bobbin loader to weaving machine main body simultaneously
It weaves.But when in use, it may appear that two are unfavorable for the factor of large circle machine operation.It can be produced in the operation process of large circle machine
Raw a large amount of flyings are miscellaneous, if being effectively treated not in time to these impurity, will cause the pollution of working environment, influence cloth matter
Amount;The case where device of transmission yarn is easy to appear opposite sliding, can will affect the speed of transmission yarn in opposite sliding.With
On can all cause large circle machine operating it is not normal, reduce machine service efficiency.
Summary of the invention
Since large circle machine can generate the quality that flying mixed cargo influences cloth in terms of working environment;The meeting when transmitting yarn
There is sliding and influences transmission speed.
In view of the above problems, the present invention provides a kind of large circle machine, a kind of effect pick-up performance height and transmission stability are good
Large circle machine.
To achieve the above object, the present invention provides the following technical scheme that a kind of effect pick-up performance height and transmission stability
Good large circle machine, including rack, frame top are equipped with yarn gear unit, are provided with weaving loom below yarn gear unit
Body.Body two sides are provided with bobbin loader, and multiple drums are connected on bobbin loader;The position of each drum is corresponded on the bobbin loader
Place is equipped with hanging bar, and hanging one end is equipped with above acclivitous brace section, and corresponding each drum on hanging bar
Conductor rod is respectively provided at position, the free end of conductor rod is connected with wire head.The yarn gear unit includes driving motor, is driven
Driving wheel is connected to by driving shaft on dynamic motor, the side of driving wheel passes through primary transmission wheel;Above primary transmission wheel under
Side is respectively connected with level-one tensioning wheel by level-one shaft, and two-stage transmission belt is connected on each tensioning wheel;Each secondary transmission band
Inside is connected with multiple equally distributed stage transmission wheels of annular, below stage transmission wheel connection line sending unit simultaneously with two two
Two stage transmission wheels connection on grade transmission belt.Dedusting collection device, including gear are equipped between body and yarn gear unit
Konisphere, scraping article, sweep-up pipe, dust absorption fan and dust collecting container, the dust-proofing ring are set on table top.
Preferably, second level tensioning wheel, second level tensioning wheel and stage transmission wheel difference are also connected on the secondary transmission band
It is connected to the outside and inside of secondary transmission band.
Through the above technical solutions, since the yarn on the drum connected on bobbin loader is sent to spinning by yarn Chuan Dong Unit member
Weave at loom body, yarn gear unit by driving motor drive driving wheel rotate, driving wheel by primary transmission band,
Primary transmission wheel, level-one rate of rotation by driving two level-one tensioning wheels being located above and below primary transmission wheel to rotate simultaneously, and two
A level-one tensioning wheel passes through secondary transmission band and drives stage transmission wheel, and two two by connecting on two secondary transmission bands
Grade driving wheel drives line sending unit to carry out line sending simultaneously, is able to carry out dual drive, even if one of secondary transmission band occurs
It also can be normally driven with topic, to improve transmission stability, improve processing efficiency.
Preferably, the line sending unit includes Wire Wheel, and Wire Wheel is distributed with two vertically simultaneously by second level shaft
Stage transmission wheel connection;Line sending frame is provided between Wire Wheel and stage transmission wheel, line sending frame side is provided with idler wheel;Idler wheel and
Solid wedge shape lubrication block is connected between line sending frame, wedge shape lubrication block two sides are connected with mounting rack;Mounting rack over top is set
It is equipped with top plate, top plate and asking for mounting rack are connected with spring.Line sending frame top end part, middle part and bottom end are equipped with through-hole.
Preferably, the side that the wedge shape lubrication block is connect with idler wheel is equipped with inclined-plane, the base area ratio of wedge shape lubrication block
The top surface area of wedge shape lubrication block is big.
Through the above technical solutions, idler wheel and wedge shape lubrication block are to yarn since setting line sending unit carries out line sending and lubrication
Line is lubricated and spring makes wedge shape lubrication block keep up mobile trend, can automatically adjust wedge shape profit slide position simultaneously
So that idler wheel and wedge shape is lubricated block and keep fitting, it is ensured that lubricant effect avoids yarn from wearing or break in transmission, improves transmission
Stability and product quality.
Preferably, wire head one end is equipped with symmetrical two elastic pieces, and two elastic pieces are asked equipped with gap;It leads
The mounting hole for being equipped at the position below gap and being connected to gap is corresponded on the end of a thread, and solid cyclic annular lubrication is connected in mounting hole
Block;Asking for described two elastic pieces is connected with adjusting bolt.
Through the above technical solutions, since the adjusting bolt on the wire head can adjust the sky between two elastic pieces
Gap size, and then cyclic annular lubrication block is clamped, so that cyclic annular lubrication block is adjacent to yarn and be lubricated, further avoids yarn in transmission
Abrasion or broken string, improve transmission stability and product quality.
Preferably, multiple dust removal ports are provided on the dust-proofing ring side wall;The scraping article is fixed on turntable side wall;It is described
Sweep-up pipe include general pipeline and it is multiple be in charge of, multiple described being in charge of are all connected to general pipeline, described to be in charge of quantity and dust removal port quantity
Unanimously, and with dust removal port it connects one to one;The dust absorption fan is connected to general pipeline;The dust collecting container is connected to dust absorption fan
Rear end, and the rear end of dust collecting container offers multiple through-holes.
Through the above technical solutions, dust-proofing ring side wall is provided with multiple dust removal ports, cooperation dust absorption fan improves efficiency of dust collection,
Enable rotary table dedusting in multiple directions again;Scraping article is unfavorable for removing on table top for avoiding sundries from sticking in, and is convenient for dust suction wind
Machine inhales whole sundries in dust collecting container;The through-hole of dust collecting container rear end provides a convective wind for dust absorption fan, improves and inhales
Dirt efficiency.
Preferably, the sweep-up pipe is soft tube.
Through the above technical solution, it is dismantled while soft tube save the cost easier for installation.
Preferably, described to be in charge of between dust removal port, between dust absorption fan and general pipeline, between dust collecting container and dust absorption fan
It is to be detachably connected.
Through the above technical solution, design for disassembly is helped clean up and is replaced.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the top view of yarn transmission unit of the present invention.
Fig. 3 is the top view of yarn transmission unit of the present invention.
Fig. 4 is the stage transmission wheel of yarn transmission unit of the present invention and the attachment structure schematic diagram of line sending unit.
Fig. 5 is the structural schematic diagram of the wire head of yarn transmission unit of the present invention.
Fig. 6 is the structural schematic diagram of dedusting collection device table top of the present invention.
Fig. 7 is the structural schematic diagram of the dust collecting container of dedusting collection device of the present invention.
Appended drawing reference: 1, rack;2, yarn Chuan Dong Unit member;3, weaving body;4, bobbin loader;5, drum;6, driving motor;
7, driving shaft;8, driving wheel;9, primary transmission band;10, primary transmission wheel;11, level-one shaft;12, level-one tensioning wheel;13, two
Grade transmission belt;14, stage transmission wheel;15, dust-proofing ring;16, scraping article;17, sweep-up pipe;18, dust absorption fan;19, dust collecting container;
20, Wire Wheel;21, second level shaft;22, line sending frame;23, idler wheel;24, wedge shape lubrication block;25, mounting rack;26, upper frame;27, bullet
Spring;28, hanging bar;29, brace section;30, conductor rod;31, wire head;32, elastic piece;33, gap;34, mounting hole;35, ring
Shape lubricates block;36, bolt is adjusted;37, second level tensioning wheel;38, dust removal port;39, turntable;40, general pipeline;41, it is in charge of;42, lead to
Hole;43, yarn.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
A kind of large circle machine is constituted as shown in Fig. 1 to 7, including rack 1, is equipped with yarn Chuan Dong Unit member 2, yarn at the top of rack 1
The lower section for passing dynamic Unit member 2 is provided with weaving body 3;1 two sides of rack are provided with bobbin loader 4, and multiple lines are connected on bobbin loader 4
Disk 5;The yarn gear unit 2 includes driving motor 6, passes through driving shaft 7 on driving motor 6 and is connected with driving wheel 8, driving wheel
8 side is connected with primary transmission wheel 10 by primary transmission band 9, passes through level-one shaft 11 above and below primary transmission wheel 10
It is respectively connected with level-one tensioning wheel 12, is connected with secondary transmission band 13 on each first tensioning wheel 12;In each secondary transmission band 13
Side is connected with multiple stage transmission wheels 14 equally distributed in a ring, connects line sending unit, send Xian Unit below stage transmission wheel 14
Member is connect with two stage transmission wheels 14 on two secondary transmission bands 13 simultaneously.It is equipped with and removes between body and yarn gear unit
Dirt collection device, including dust-proofing ring 15, scraping article 16, sweep-up pipe 17, dust absorption fan 18 and dust collecting container 19, the dust-proofing ring 15 are set
It is placed on great circle machine table top.
The line sending unit includes Wire Wheel 20, and Wire Wheel 20 passes through two that second level shaft 21 is distributed with two vertically simultaneously
Grade driving wheel 14 connects;Line sending frame 22 is provided between Wire Wheel 20 and stage transmission wheel 14,22 side of line sending frame is provided with rolling
Wheel 23;Solid wedge shape lubrication block 24 is connected between idler wheel 23 and line sending frame 22, wedge shape lubrication 24 two sides of block are connected with installation
Frame 25;25 over top of mounting rack is provided with top plate 26, and top plate 26 and asking for mounting rack 25 are connected with spring 27;The line sending frame
22 top end parts, middle part and bottom end are equipped with through-hole;The side that the wedge shape lubrication block 24 is connect with idler wheel 23 is equipped with tiltedly, refers to contract
The base area that shape lubricates block 24 is bigger than the top surface area of wedge shape lubrication block 24.
It is corresponded on the bobbin loader 4 and is equipped with hanging bar 28 at the position of each drum 5, hanging one end on hanging bar 28
Equipped with acclivitous brace section 29;It is corresponded on bobbin loader 4 and is respectively provided with conductor rod 30, conducting wire at the position of each 5 top of drum
The free end of bar 30 is connected with wire head 31, and 31 one end of wire head is equipped with symmetrical two elastic pieces 32, two elastic pieces
Gap 33 is equipped between 32;It is corresponded on wire head 31 and is equipped with the mounting hole 34 being connected to gap 33 at the position of 32 lower section of gap,
Solid cyclic annular lubrication block 35 is connected in mounting hole 34;Asking for described two elastic pieces 32 is connected with adjusting bolt 36;It is described
Second level tensioning wheel is also connected on secondary transmission band 13, second level tensioning wheel 37 and stage transmission wheel 14 are connected to secondary transmission
With 13 outside and inside.
In dedusting collection device, multiple dust removal ports 38 are provided on 15 side wall of dust-proofing ring;The scraping article 16 is fixed
In the side wall of turntable 39;The sweep-up pipe 17 include general pipeline 40 and it is multiple be in charge of 41, it is multiple described to be in charge of 41 and be all connected to
General pipeline 40,41 quantity of being in charge of are consistent with 38 quantity of dust removal port, and connect one to one with dust removal port 38;The dust absorption fan
18 are connected to general pipeline 40;The dust collecting container 19 is connected to the rear end of dust absorption fan 18, and the rear end of dust collecting container 19 offers
Multiple through-holes 42.
Preferably, the sweep-up pipe 17 is soft tube.
Preferably, the dust collecting container 19 is cloth bag or can or wooden box.
Preferably, described to be in charge of between 41 and dust removal port 38, between dust absorption fan 18 and general pipeline 40, dust collecting container 19 and suction
Be to be detachably connected between dirt blower 18, wherein be in charge of between 41 and dust removal port 38 to snap connection, dust absorption fan 18 with
To snap connection between general pipeline 40, connects or snap connection for spiral between the dust collecting container 19 and dust absorption fan 18
Deng.
Working principle: drum 5 is placed on hanging bar 28, and tilting section 29 limits drum 5, prevents drum 5 from falling;
Yarn 43 is sent to from conductor rod 30 from drum 5, and yarn 43 passes through cyclic annular lubrication block 35 and is lubricated, and is screwed and is adjusted bolt 36
Two elastic pieces 32 can be made close, gap 33 is made to become smaller, entreat tight cyclic annular lubrication block 35, it is ensured that lubricant effect;Then pass through yarn
Line sending unit on line gear unit 2 carries out line sending, and driving motor 6 drives driving wheel 7 to rotate, and driving wheel 7 passes through primary transmission
Band 9 drives primary transmission wheel 10 to rotate, and primary transmission wheel 10 is driven simultaneously by level-one shaft 11 is located at 9 top of primary transmission wheel
It is rotated with two level-one tensioning wheels 12 of lower section, two level-one tensioning wheels 12 drive stage transmission wheel by secondary transmission band 13
14, and by two stage transmission wheels 14 connected on two secondary transmission bands 13 while a send Xian Unit member being driven to be sent
Line, the i.e. transmission of drive Wire Wheel 20 carry out line sending, and yarn 43 is penetrated by the through-hole at 22 top of line sending frame and first passes through idler wheel 23
Between wedge-shaped phase sliding block 24, the elastic force of spring 27 moves up mounting rack 25 and wedge shape lubrication block 24, to make wedge shape
The side of lubrication block 24 is adjacent to idler wheel 23 always, and yarn 43 is pressed to the wedge-shaped progress of hole sliding block 24 hole and slided by idler wheel 23;After hole is sliding, yarn
The through-hole that line 43 is sent to 22 bottom end of line sending frame through Wire Wheel 20 after the through-hole by 22 middle part of line sending frame is oriented to, finally
It transmits to weaving body 3.Konisphere 15 is swept because of the multiple directions dedusting for there are multiple dust removal ports 38 to enable rotary table on side wall, scraping article
Whole sundries are drawn onto dust collecting container 19 by 16 sundries removals sticked on table top, dust absorption fan 18 by sweep-up pipe 17,
It is described to be in charge of between 41 and dust removal port 38, between dust absorption fan 18 and general pipeline 40, between dust collecting container 19 and dust absorption fan 18
To be detachably connected, help to replace.
In summary, being only presently preferred embodiments of the present invention, formal limitation not is made to the present invention, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, is not departing from technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to
With the equivalent embodiment of variation, but anything that does not depart from the technical scheme of the invention content, technology according to the present invention implement to
Any simple modification, equivalent change and modification made by upper embodiment, all of which are still within the scope of the technical scheme of the invention.
Claims (8)
1. a kind of large circle machine, it is characterised in that: including rack (1), frame top is equipped with yarn Chuan Dong Unit member (2), yarn transmission
Weaving body (3) is provided with below Unit member (2);Rack two sides are provided with bobbin loader (4), are connected on bobbin loader (4) more
A drum (5), the yarn gear unit (2) include driving motor (6), are connected on driving motor (6) by driving shaft (7)
The side of driving wheel (8), driving wheel (8) is connected with primary transmission wheel (10) by primary transmission band (9), primary transmission wheel (10)
Above and below be respectively connected with level-one tensioning wheel (12) by level-one shaft (11), be connected with two on each first tensioning wheel (12)
Grade transmission belt (13), each secondary transmission band (13) inside are connected with multiple stage transmission wheels (14) equally distributed in a ring,
Line sending unit is connected below stage transmission wheel (14), line sending unit is passed with two second levels on two secondary transmission bands (13) simultaneously
Driving wheel (14) connection;Dedusting collection device, including dust-proofing ring (15), scraping article are equipped between body (3) and yarn gear unit (2)
(16), sweep-up pipe (17), dust absorption fan (18) and dust collecting container (19), dust-proofing ring (15) are set on table top;The dust-proofing ring
(15) multiple dust removal ports (38) are provided on side wall;The scraping article is fixed on turntable (39) side wall;Sweep-up pipe (17) packet
Include general pipeline (40) and it is multiple be in charge of (41), multiple be in charge of (41) are all connected to general pipeline (40), described to be in charge of (41) quantity
It is consistent with dust removal port (38) quantity, and connect one to one with dust removal port (38);The dust absorption fan (17) is connected to general pipeline
(40);The dust collecting container (19) is connected to the rear end of dust absorption fan (18), and the rear end of dust collecting container (19) offer it is multiple
Through-hole (42).
2. a kind of large circle machine according to claim 1, it is characterised in that: the send Xian Unit member includes Wire Wheel (20), is sent
Line wheel (20) is connect with two stage transmission wheels being distributed vertically (14) simultaneously by second level shaft (21), Wire Wheel (20) and two
It is provided with line sending frame (22) between grade driving wheel (14), line sending frame (22) side is provided with idler wheel (23), idler wheel (23) and line sending
Solid wedge shape lubrication block (24) is connected between frame (22), wedge shape lubrication block two sides are connected with mounting rack (25);Mounting rack
(25) over top is provided with top plate (26), and spring (27) are connected between top plate (26) and mounting rack (27).
3. a kind of large circle machine according to claim 2, it is characterised in that: line sending frame (22) top end part, middle part and bottom
End is equipped with through-hole.
4. a kind of large circle machine according to claim 2, it is characterised in that: wedge shape lubrication block (24) and idler wheel (23) is even
The side connect is equipped with inclined-plane, and the base area of wedge shape lubrication block (24) is bigger than the top surface area of wedge shape lubrication block (24).
5. a kind of large circle machine according to claim 1, it is characterised in that: each drum (5) are corresponded on the bobbin loader (4)
Position at be equipped with hanging bar (28), on hanging bar (28) hanging one end be equipped with acclivitous brace section (29);Drum
It corresponds to and is respectively provided at the position above each drum (5) conductor rod (30) on frame (4), the free end of conductor rod (30), which is connected with, leads
The end of a thread (31);Wire head (31) one end is equipped with symmetrical two elastic pieces (32), is equipped with sky between two elastic pieces (32)
Gap;The mounting hole (34) for being equipped at the position below gap and being connected to gap is corresponded on wire head (31), is connected in mounting hole
Solid cyclic annular lubrication block (35);Adjusting bolt is connected between described two elastic pieces (32).
6. the large circle machine good to a kind of transmission stability described in any claim in 5, feature exist according to claim 1
In: it is also connected on the secondary transmission band second level tensioning wheel (37), second level tensioning wheel (37) and stage transmission wheel (14) are respectively
It is connected to the outside and inside of secondary transmission band (13).
7. large circle machine according to claim 1, it is characterized in that: the sweep-up pipe (17) is soft in dedusting collection device
Property pipe, the dust collecting container (19) is cloth bag or can or wooden box.
8. large circle machine according to claim 1, it is characterized in that: in dedusting collection device, it is described to be in charge of (41) and dedusting
It is removable between dust collecting container (19) and dust absorption fan (18) between dust absorption fan (18) and general pipeline (40) between mouth (38)
Unload connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810576390.5A CN109097904A (en) | 2018-06-06 | 2018-06-06 | A kind of large circle machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810576390.5A CN109097904A (en) | 2018-06-06 | 2018-06-06 | A kind of large circle machine |
Publications (1)
Publication Number | Publication Date |
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CN109097904A true CN109097904A (en) | 2018-12-28 |
Family
ID=64796677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810576390.5A Withdrawn CN109097904A (en) | 2018-06-06 | 2018-06-06 | A kind of large circle machine |
Country Status (1)
Country | Link |
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CN (1) | CN109097904A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182355B (en) * | 1985-10-28 | 1989-04-12 | Precision Fukuhara Works Ltd | Lint removing apparatus for circular knitting machine |
CN201560296U (en) * | 2009-11-30 | 2010-08-25 | 东莞德永佳纺织制衣有限公司 | Circular knitting machine with dust collector |
CN106149190A (en) * | 2016-08-31 | 2016-11-23 | 浙江彩蝶实业有限公司 | Improve method and the large circle machine of large circle machine transmission stability |
CN205741486U (en) * | 2016-06-15 | 2016-11-30 | 浙江赛博家纺有限公司 | A kind of large circle machine |
CN206359738U (en) * | 2016-11-30 | 2017-07-28 | 绍兴市柯桥帝朗纺织品有限公司 | A kind of big round-machine dedusting device |
-
2018
- 2018-06-06 CN CN201810576390.5A patent/CN109097904A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182355B (en) * | 1985-10-28 | 1989-04-12 | Precision Fukuhara Works Ltd | Lint removing apparatus for circular knitting machine |
CN201560296U (en) * | 2009-11-30 | 2010-08-25 | 东莞德永佳纺织制衣有限公司 | Circular knitting machine with dust collector |
CN205741486U (en) * | 2016-06-15 | 2016-11-30 | 浙江赛博家纺有限公司 | A kind of large circle machine |
CN106149190A (en) * | 2016-08-31 | 2016-11-23 | 浙江彩蝶实业有限公司 | Improve method and the large circle machine of large circle machine transmission stability |
CN206359738U (en) * | 2016-11-30 | 2017-07-28 | 绍兴市柯桥帝朗纺织品有限公司 | A kind of big round-machine dedusting device |
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WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181228 |
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WW01 | Invention patent application withdrawn after publication |