CN108590828A - A kind of hush pipe for automobile exhaust pipe - Google Patents
A kind of hush pipe for automobile exhaust pipe Download PDFInfo
- Publication number
- CN108590828A CN108590828A CN201810645469.9A CN201810645469A CN108590828A CN 108590828 A CN108590828 A CN 108590828A CN 201810645469 A CN201810645469 A CN 201810645469A CN 108590828 A CN108590828 A CN 108590828A
- Authority
- CN
- China
- Prior art keywords
- outer tube
- pipe
- tube
- gas
- oil
- 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
- 239000000446 fuel Substances 0.000 claims abstract description 20
- 229920000742 Cotton Polymers 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims description 9
- 230000003628 erosive effect Effects 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 7
- 239000005060 rubber Substances 0.000 claims description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 description 6
- 241000219146 Gossypium Species 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 206010053615 Thermal burn Diseases 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/08—Surface coverings for corrosion prevention
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention discloses a kind of hush pipes for automobile exhaust pipe, including outer tube, one end of the outer tube is connected with air inlet pipe, the left end of the outer tube is connected with drive end bearing bracket by bolt thread, the right end of the outer tube is connected with rear end cap by bolt thread, and escape pipe is connected at the gas outlet of the outer tube, wave crest acoustical cotton is provided on the madial wall of the outer tube, oil scupper is offered on the madial wall of the outer pipe bottom, the bottom of the outer tube right end is provided with fuel reserve tank.The present invention can discharge the oil gas of adhesion on outer tube wall, weaken oil gas caused by hush pipe to corrode, avoid influencing the use of hush pipe, extend the service life of hush pipe, ensure the good erasure effect of automobile, reduces the influence caused by people’s lives, the oil that oil scupper can be discharged focuses on, it avoids the continuous drippage of oil during traveling inside hush pipe from leading to the pollution of environment, resource can be saved, reduce cost.
Description
Technical field
The present invention relates to technical field of automobile accessories, specially a kind of hush pipe for automobile exhaust pipe.
Background technology
Auto parts machinery（auto parts）It is each unit for constituting automobile entirety and a kind of product for serving automobile, vapour
The type of vehicle accessory is various, and nowadays the brand of automobile is more and more, and the type of automobile is also more and more.Automobile can be divided into and multiply
With two kinds of vehicle and commercial car, wherein passenger car refers to that vehicle seat is sat less than nine（Containing driver position）, with carrying for main syllabus
Vehicle.Specifically, passenger car is divided into as basic passenger car i.e. car, and MPV vehicles, SUV vehicles and other vehicles are such as
Pick up etc., with increasing for vehicle, although the trip to people is brought conveniently, the noise of automobile exhaust pipe seriously affects
People’s lives, although being equipped with hush pipe on the exhaust pipe of automobile now, due to containing a large amount of oil in vehicle exhaust
Gas is easy to cause to corrode to hush pipe, influences the use of hush pipe.
Invention content
The purpose of the present invention is to provide a kind of hush pipe for automobile exhaust pipe, have can weaken hush pipe by
Corrosion the advantages of, solve inconvenient problem with use in the prior art.
To achieve the above object, the present invention provides the following technical solutions：A kind of hush pipe for automobile exhaust pipe, including
One end of outer tube, the outer tube is connected with air inlet pipe, and the left end of the outer tube is connected with drive end bearing bracket by bolt thread, described outer
The right end of pipe is connected with rear end cap by bolt thread, is connected with escape pipe at the gas outlet of the outer tube, the outer tube it is interior
It is provided with wave crest acoustical cotton on side wall, oil scupper, the bottom of the outer tube right end are offered on the madial wall of the outer pipe bottom
It is provided with fuel reserve tank.
The outer tube is internally provided with inner tube, and splitter cavity, the inner cavity of said inner tube are formed between the outer tube and inner tube
Middle setting there are two identical acoustical panel, said inner tube be located at acoustical panel left and right side part offer it is equally distributed
Tap hole, the tap hole are connected to splitter cavity, and the lateral surface of the acoustical panel offers equally distributed air hole, described to disappear
It is provided with gas-guide tube between soundboard, and is both provided with protective cover on the inside of two acoustical panels, and the protection on the left of gas-guide tube
The gas outlet of cover is connected to the air inlet of gas-guide tube, is located at the gas outlet of the air inlet and gas-guide tube of the protective cover on the right side of gas-guide tube
It is connected to, erosion resistant coating is both provided on the outer surface of said inner tube and the madial wall of outer tube.
Preferably, diversion trench is offered on the madial wall of said inner tube bottom, the diversion trench will be between each tap hole
It is interconnected, and diversion trench is connected to by tap hole with oil scupper.
Preferably, the erosion resistant coating includes glass epoxy, and anti-corrosive rubber plate, institute are provided on the outside of the glass epoxy
It states and is provided with phenolic resin plate on the outside of anti-corrosive rubber plate.
Preferably, the fuel reserve tank is connected to the lower surface of outer tube by bolt thread, and oil scupper passes through outer tube following table
The through-hole that face opens up is connected to fuel reserve tank.
Compared with prior art, beneficial effects of the present invention are as follows：
1, the oil gas of adhesion on outer tube wall can be discharged by being provided with oil scupper on the madial wall of outer tube by the present invention
It goes, weakens oil gas and corrode caused by hush pipe, avoid the use for influencing hush pipe, extend the service life of hush pipe, ensure
The good erasure effect of automobile reduces the influence caused by people’s lives, more convenient to use, and by under outer tube
Side is provided with fuel reserve tank, and the oil that oil scupper can be discharged focuses on, and avoids the oil inside hush pipe during traveling
Continuous drippage leads to the pollution of environment, can save resource, reduce cost.
2, the present invention is in the outer surface of outer tube and inner tube by being both provided with erosion resistant coating, can be very good to avoid hush pipe by
The normal use of hush pipe is protected while oil is discharged oil scupper to corrosion, so as to extend the use longevity of hush pipe
Life, and is bolted between fuel reserve tank and outer tube, facilitates and dismantles fuel reserve tank, can regularly to fuel reserve tank into
Row cleaning, the oil gas of storage is focused on or is recycled, can save resource, reduce cost, and outer tube
Both ends are respectively arranged with drive end bearing bracket and rear end cap, facilitate and dismantle outer tube, hush pipe easy to clean and to hush pipe carry out
Repair, it is easy to use.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is anti-corrosion layer structure schematic diagram of the present invention.
In figure：1 outer tube, 2 wave crest acoustical cottons, 3 splitter cavities, 4 inner tubes, 5 erosion resistant coatings, 51 glass epoxies, 52 anti-corrosive rubbers
Plate, 53 phenolic resin plates, 6 tap holes, 7 rear end caps, 8 fuel reserve tanks, 9 through-holes, 10 oil scuppers, 11 acoustical panels, 12 gas-guide tubes, 13 are thoroughly
Stomata, 14 diversion trenches, 15 air inlet pipe, 16 drive end bearing brackets.
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.
Please refer to Fig.1-2, a kind of hush pipe for automobile exhaust pipe, including outer tube 1, by being provided with inner tube 4 and outer
Pipe 1 can not only play good erasure effect, reduce the influence caused by people’s lives, and can play well
Heat-insulated effect, avoiding people's will from touching exhaust pipe outside causes to scald, and using more safe ready, one end of outer tube 1 is connected with
The tail gas of air inlet pipe 15, square automobile discharge enters in hush pipe, weakens noise, the left end of outer tube 1 is connected with by bolt thread
The right end of drive end bearing bracket 16, outer tube 1 is connected with rear end cap 7 by bolt thread, facilitates and dismantles outer tube 1, convenient to noise reduction
Pipe repairs, more convenient to use, and if there is damage, it is only necessary to which removable parts part can save cost, outer tube
It is connected with escape pipe at 1 gas outlet, wave crest acoustical cotton 2 is provided on the madial wall of outer tube 1, good sound-absorbing effect can be played
Fruit weakens the impact force of gas and outer tube 1, the energy that gas collisions generate is absorbed, to reduce noise, 1 bottom of outer tube
Oil scupper 10 is offered on the madial wall in portion, the oil gas of adhesion on 1 inner wall of outer tube can be discharged, and weakens oil gas to hush pipe
Caused by corrode, avoid the use for influencing hush pipe, extend the service life of hush pipe, ensure the good erasure effect of automobile,
The influence caused by people’s lives is reduced, more convenient to use, the bottom of 1 right end of outer tube is provided with fuel reserve tank 8, can will arrange
The oil centralized processing that oil groove 10 is discharged avoids the continuous drippage of oil during traveling inside hush pipe from leading to the dirt of environment
Dye, can save resource, reduce cost, fuel reserve tank 8 is connected to the lower surface of outer tube 1 by bolt thread, and oil scupper 10 is logical
It crosses the through-hole 9 that 1 lower surface of outer tube opens up to be connected to fuel reserve tank 8, facilitates and dismantle fuel reserve tank 8, it can be regularly to oil storage
Case 8 is cleared up, and the oil gas of storage is focused on or recycled, resource can be saved, reduce cost.
Outer tube 1 is internally provided with inner tube 4, and dual soundproof effect is more preferable, and can play the role of protection, not only may be used
It is damaged to avoid hush pipe, and can be to avoid scald people, using more safe ready, on the madial wall of 4 bottom of inner tube
Diversion trench 14 is offered, diversion trench 14 will be interconnected between each tap hole 6, and diversion trench 14 passes through tap hole 6 and oil extraction
Slot 10 is connected to, and is facilitated the oil discharge on the madial wall of inner tube 4, avoid it is oily stick in inner tube 4 for a long time cause inner tube 4 by
Corrosion avoids the use for influencing hush pipe, forms splitter cavity 3 between outer tube 1 and inner tube 4, can disperse gas, to weaken
The impact force of gas plays the effect for reducing noise, and there are two identical acoustical panel 11, inner tubes 4 for setting in the inner cavity of inner tube 4
Equally distributed tap hole 6 is offered in the part of 11 left and right side of acoustical panel, tap hole 6 is connected to splitter cavity 3, to gas
The impact force of body is offset, and weakens the speed of gas discharge, to weaken noise, the lateral surface of acoustical panel 11 offers uniformly
The air hole 13 of distribution is provided with gas-guide tube 12 between acoustical panel 11, and the inside of two acoustical panels 11 is both provided with protective cover,
The flow direction of gas is controlled, and the gas outlet of the protective cover positioned at 12 left side of gas-guide tube is connected to the air inlet of gas-guide tube 12, is located at
The air inlet of the protective cover on 12 right side of gas-guide tube is connected to the gas outlet of gas-guide tube 12, facilitates the circulation of gas, the appearance of inner tube 4
It is both provided with erosion resistant coating 5 on the madial wall of face and outer tube 1, can be corroded to avoid hush pipe, making for impact effect pipe is avoided
With extending the service life of hush pipe, erosion resistant coating 5 includes glass epoxy 51, and the outside of glass epoxy 51 is provided with corrosion-resistant rubber
The outside of offset plate 52, anti-corrosive rubber plate 52 is provided with phenolic resin plate 53, can be with by being used cooperatively for these anti-corrosion materials
Reach good etch-proof effect, hush pipe is preferably protected.
Operation principle：In use, vehicle exhaust is entered by air inlet pipe 15 in inner tube 4, then enters by tap hole 6 and divide
Chamber 3 is flowed, is entered in inner tube 4 again by tap hole 6 after being absorbed the noise of gas using wave crest acoustical cotton 2, tail gas
The oil of middle carrying can stick on outer tube 12 and inner tube 4, and oil can be entered along oil scupper 10 in fuel reserve tank 8 by diversion trench 14,
Hush pipe is avoided to be corroded.
In summary：This is used for the hush pipe of automobile exhaust pipe, by being both provided in the outer surface of outer tube 1 and inner tube 4
Erosion resistant coating 5 can be very good that hush pipe is avoided to be corroded, and while oil is discharged oil scupper 10, protect hush pipe just
Be often used, so as to extend the service life of hush pipe, and be bolted between fuel reserve tank 8 and outer tube 1, facilitate by
Fuel reserve tank 8 is dismantled, and can regularly be cleared up fuel reserve tank 8, and the oil gas of storage is focused on or recycled
Utilize, resource can be saved, reduce cost, and the both ends of outer tube 1 are respectively arranged with drive end bearing bracket 16 and rear end cap 7, facilitate by
Outer tube 1 is dismantled, and hush pipe easy to clean and is repaired to hush pipe, easy to use, is solved and is used in the prior art
Inconvenient problem.
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 (4)
1. a kind of hush pipe for automobile exhaust pipe, including outer tube（1）, it is characterised in that：The outer tube（1）One end connection
There is air inlet pipe（15）, the outer tube（1）Left end drive end bearing bracket is connected with by bolt thread（16）, the outer tube（1）Right end
It is connected with rear end cap by bolt thread（7）, the outer tube（1）Gas outlet at be connected with escape pipe, the outer tube（1）It is interior
Wave crest acoustical cotton is provided on side wall（2）, the outer tube（1）Oil scupper is offered on the madial wall of bottom（10）, the outer tube
（1）The bottom of right end is provided with fuel reserve tank（8）；
The outer tube（1）Be internally provided with inner tube（4）, the outer tube（1）With inner tube（4）Between form splitter cavity（3）, described
Inner tube（4）Inner cavity in setting there are two identical acoustical panel（11）, said inner tube（4）Positioned at acoustical panel（11）Left and right side
Part offer equally distributed tap hole（6）, the tap hole（6）With splitter cavity（3）Connection, the acoustical panel（11）
Lateral surface offer equally distributed air hole（13）, the acoustical panel（11）Between be provided with gas-guide tube（12）, and two
Acoustical panel（11）Inside be both provided with protective cover, and be located at gas-guide tube（12）The gas outlet of the protective cover in left side and gas-guide tube
（12）Air inlet connection, be located at gas-guide tube（12）The air inlet and gas-guide tube of the protective cover on right side（12）Gas outlet connection,
Said inner tube（4）Outer surface and outer tube（1）Madial wall on be both provided with erosion resistant coating（5）.
2. a kind of hush pipe for automobile exhaust pipe according to claim 1, it is characterised in that：Said inner tube（4）Bottom
Diversion trench is offered on the madial wall in portion（14）, the diversion trench（14）By each tap hole（6）Between be interconnected, and water conservancy diversion
Slot（14）Pass through tap hole（6）With oil scupper（10）Connection.
3. a kind of hush pipe for automobile exhaust pipe according to claim 1, it is characterised in that：The erosion resistant coating（5）
Including glass epoxy（51）, the glass epoxy（51）Outside be provided with anti-corrosive rubber plate（52）, the anti-corrosive rubber
Plate（52）Outside be provided with phenolic resin plate（53）.
4. a kind of hush pipe for automobile exhaust pipe according to claim 1, it is characterised in that：The fuel reserve tank（8）
It is connected to outer tube by bolt thread（1）Lower surface, and oil scupper（10）Pass through outer tube（1）The through-hole that lower surface opens up（9）
With fuel reserve tank（8）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645469.9A CN108590828B (en) | 2018-06-21 | 2018-06-21 | Silencing pipe for automobile exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810645469.9A CN108590828B (en) | 2018-06-21 | 2018-06-21 | Silencing pipe for automobile exhaust pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108590828A true CN108590828A (en) | 2018-09-28 |
| CN108590828B CN108590828B (en) | 2024-04-12 |
Family
ID=63628517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810645469.9A Active CN108590828B (en) | 2018-06-21 | 2018-06-21 | Silencing pipe for automobile exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590828B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073755A (en) * | 1999-09-01 | 2001-03-21 | Nakagawa Sangyo Kk | Exhaust pipe and exhaust system of internal combustion engine |
| US20020088667A1 (en) * | 2001-01-11 | 2002-07-11 | Sankei Giken Kogyo Kabushiki Kaisya | Engine muffler and method of manufacturing the same |
| TWM251928U (en) * | 2004-02-09 | 2004-12-01 | Shu-He Huang | An improved inner structure of a muffler |
| JP2005054587A (en) * | 2003-08-04 | 2005-03-03 | Hino Motors Ltd | Exterior part for exhaust gas treatment component |
| CN2861506Y (en) * | 2005-11-30 | 2007-01-24 | 比亚迪股份有限公司 | Inlet pipe for vehicle exhaustion and front exhaust pipe containing such |
| US20090139219A1 (en) * | 2004-10-01 | 2009-06-04 | Faurecia Systemes D'echappement, S.A.S. | Exhaust conduit |
| CN105909342A (en) * | 2016-06-01 | 2016-08-31 | 陈焕祥 | Silencing equipment for internal combustion engine exhaust pipe |
| CN208330513U (en) * | 2018-06-21 | 2019-01-04 | 郑州玖意优创商贸有限公司 | A kind of hush pipe for automobile exhaust pipe |
-
2018
- 2018-06-21 CN CN201810645469.9A patent/CN108590828B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073755A (en) * | 1999-09-01 | 2001-03-21 | Nakagawa Sangyo Kk | Exhaust pipe and exhaust system of internal combustion engine |
| US20020088667A1 (en) * | 2001-01-11 | 2002-07-11 | Sankei Giken Kogyo Kabushiki Kaisya | Engine muffler and method of manufacturing the same |
| JP2005054587A (en) * | 2003-08-04 | 2005-03-03 | Hino Motors Ltd | Exterior part for exhaust gas treatment component |
| TWM251928U (en) * | 2004-02-09 | 2004-12-01 | Shu-He Huang | An improved inner structure of a muffler |
| US20090139219A1 (en) * | 2004-10-01 | 2009-06-04 | Faurecia Systemes D'echappement, S.A.S. | Exhaust conduit |
| CN2861506Y (en) * | 2005-11-30 | 2007-01-24 | 比亚迪股份有限公司 | Inlet pipe for vehicle exhaustion and front exhaust pipe containing such |
| CN105909342A (en) * | 2016-06-01 | 2016-08-31 | 陈焕祥 | Silencing equipment for internal combustion engine exhaust pipe |
| CN208330513U (en) * | 2018-06-21 | 2019-01-04 | 郑州玖意优创商贸有限公司 | A kind of hush pipe for automobile exhaust pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108590828B (en) | 2024-04-12 |
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Effective date of registration: 20240318 Address after: 400000 No.7 Jingsheng Road, Jingkou Industrial Park, Shapingba District, Chongqing Applicant after: CHONGQING LINGCHUAN AUTO PARTS MANUFACTURING TECHNOLOGY Co.,Ltd. Country or region after: China Address before: No. 26, 2nd Floor, Building 4, No. 201 Jinshui Road, Jinshui District, Zhengzhou City, Henan Province, 450003 Applicant before: ZHENGZHOU JIUYI YOUCHUANG COMMERCE AND TRADE CO.,LTD. Country or region before: China |
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