CN104088685A - Air exhaust purification silencer - Google Patents
Air exhaust purification silencer Download PDFInfo
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- CN104088685A CN104088685A CN201410175935.3A CN201410175935A CN104088685A CN 104088685 A CN104088685 A CN 104088685A CN 201410175935 A CN201410175935 A CN 201410175935A CN 104088685 A CN104088685 A CN 104088685A
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- central diaphragm
- silencing apparatus
- outlet pipe
- upper casing
- lower casing
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Abstract
The invention discloses an air exhaust purification silencer which is safe, reliable and environmentally-friendly. The air exhaust purification silencer comprises an upper silencer shell, a lower silencer shell, a middle partition plate, an air exhaust pipe and an air outlet pipe, wherein the middle partition plate is arranged between the upper silencer shell and the lower silencer shell; the upper silencer shell, the lower silencer shell and the middle partition plate are seamlessly connected; an air inlet pipe is arranged on the middle partition plate; one end of the air inlet pipe is connected with the air exhaust pipe, and the other end of the air inlet pipe is communicated with a space formed by the lower silencer shell and the middle partition plate; a catalytic device is arranged at the other end, close to the air inlet pipe, of the middle partition plate; a liner pipe is further arranged on the middle partition plate; one end of the liner pipe is connected with the air outlet pipe, and the other end of the liner pipe is communicated with a space formed by the upper silencer shell and the middle partition plate; a spark extinguisher is arranged in the air outlet pipe. The air exhaust purification silencer has the benefits of good safety and reliability, environmental friendliness, good heat insulation effect, long service life, high silencing efficiency, good sound insulation effect, high airflow conversion rate, high purification capacity, and high stability and firmness in mounting.
Description
Technical field
The present invention relates to silencing apparatus correlative technology field, refer in particular to a kind of exhaust purging muffler.
Background technique
Silencing apparatus is to allow air-flow to pass through, but can stop or reduce a kind of device of sound transmission, is the important measures of eliminating air power noise.Silencing apparatus can stop sound wave propagation, allows air-flow to pass through, and is the effective tool of controlling noise.Silencing apparatus kind is a lot, but studies carefully its noise elimination mechanism, it can be divided into six kinds of main types again, i.e. dissipative muffler, reactive muffler, impedance complex formula silencing apparatus, micropunch plate muffler, micropole diffusor and active silencer.Existing silencing apparatus, adopts impedance composite noise-cancelling theory mostly.Due to reasons such as complex structure, weight are large, high temperature oxidation sound absorption filler, and high velocity air impacts sound absorption filler, aqueous vapor infiltration sound absorption filler, the situation such as silencing apparatus is easy to occur that maintenance is frequent, soundproof effect is poor, and life cycle is short.And existing exhaust silencer is just to the air-flow processing of eliminating the noise, cannot process for the harmful gas in air-flow, it is affected for atmosphere environment.
Chinese patent notice of authorization number: CN100379953C, April 9 2008 notice of authorization day, a kind of muffler of motor vehicle for exhaust gas purification is disclosed, it comprises housing, the suction tude of settling in housing one end, the steam outlet pipe of settling at the housing the other end, the front capping of installing in the housing one end that is positioned at suction tude, and the rear seal-cover of installing at the housing the other end that is positioned at steam outlet pipe; It is also included in the inner core that wherein one end of enclosure interior arrangement is fixing with suction tude sealing, the other end is eddy flow air outlet and be connected with steam outlet pipe, inner core positioned inside and by the fixing cyclone separator of support, the catalysis heat-transfer device of installing between housing and inner core, and the front venetian blind air suction inlet arranging in front capping.The deficiency of this invention is, soundproof effect is poor, without heat insulation measures, the air-flow of purified treatment is directly discharged and is had certain potential safety hazard.
Summary of the invention
There is above-mentioned deficiency in order to overcome in prior art in the present invention, a kind of exhaust purging muffler of safe and reliable and environmental protection is provided.
To achieve these goals, the present invention is by the following technical solutions:
A kind of exhaust purging muffler, comprise silencing apparatus upper casing, silencing apparatus lower casing, central diaphragm, outlet pipe and steam outlet pipe, described central diaphragm is placed between silencing apparatus upper casing and silencing apparatus lower casing, described silencing apparatus upper casing, silencing apparatus lower casing and central diaphragm seamless link, described central diaphragm is provided with suction tude, one end of described suction tude connects outlet pipe, the other end of described suction tude is communicated with the space that silencing apparatus lower casing and central diaphragm form, the other end place near suction tude on described central diaphragm is provided with catalysis device, on described central diaphragm, be also provided with interior bile duct, one end of described interior bile duct connects steam outlet pipe, the other end of described interior bile duct is communicated with the space that silencing apparatus upper casing and central diaphragm form, in described steam outlet pipe, be provided with spark arrester.
In the present invention, first the air-flow being entered by outlet pipe enters in the space that silencing apparatus lower casing and central diaphragm form, then by catalysis device, the harmful gas in air-flow is processed, discharge from steam outlet pipe by interior bile duct afterwards, owing to being provided with spark arrester in steam outlet pipe, absorb spark by spark arrester, can ensure to discharge the Security of air-flow, thereby ensured the safety reliability of this device; Can fully harmful gas be converted into innocuous gas by catalysis device, the discharge that makes air-flow can pollution of atmosphere environment, environmental protection; And in the space that in the space that silencing apparatus lower casing and central diaphragm form, air-flow and silencing apparatus upper casing and central diaphragm form, air-flow interferes, and reaches the object of noise elimination noise reduction.
As preferably, described catalysis device is placed between suction tude and interior bile duct, described catalysis device comprises metal beehive catalyst converter and two guide plates, being shaped as of described metal beehive catalyst converter is cylindrical, the outside of described metal beehive catalyst converter is provided with heat insulating tube, described heat insulating tube is arranged on central diaphragm, described metal beehive catalyst converter is arranged in heat insulating tube, described guide plate is arranged on central diaphragm and is placed in metal beehive catalyst converter top, and described metal beehive catalyst converter, heat insulating tube and guide plate distributes with the plane symmetry at central diaphragm place.Heat insulating tube design can not be affected because of the temperature variation of central diaphragm metal beehive catalyst converter, has improved the working life of metal beehive catalyst converter; Can guide air-flow to enter into metal beehive catalyst converter by guide plate simultaneously, harmful gas can be transformed fully, improve the transformation efficiency of air-flow, improve the purifying ability of device.
As preferably, the complete covering metal honeycomb of described guide plate catalyst converter, described guide plate is provided with targeting port, the direction that is oriented inside bile duct of described targeting port.The structural design of guide plate can make air-flow contacting metal honeycomb catalyst converter fully on the one hand, and harmful air-flow can be transformed fully; On the other hand, can make the air-flow after conversion discharge from steam outlet pipe by interior bile duct fast.
As preferably, described interior bile duct comprises inner bag upper casing and inner bag lower casing, the cross section of described inner bag upper casing and inner bag lower casing is semicircle, described inner bag lower casing is arranged on central diaphragm and is placed in silencing apparatus lower casing and space one side that central diaphragm forms, one end of described inner bag lower casing is connected with steam outlet pipe, the other end of described inner bag lower casing and central diaphragm seamless link, described inner bag upper casing is arranged on central diaphragm and is placed in silencing apparatus upper casing and space one side that central diaphragm forms, one end of described inner bag upper casing is connected with steam outlet pipe, the other end of described inner bag lower casing is provided with opening.Wherein: the structural design of suction tude is consistent with the structural design of interior bile duct.
As preferably, described central diaphragm is provided with some through holes.Can effectively shunt processing to air-flow, make the air-flow after shunting mutually interfere and improve acoustical absorptivity.
As preferably, described central diaphragm is provided with ram's horns, described ram's horns be shaped as U-shaped, the space that the space that the two ends of described ram's horns all form with silencing apparatus upper casing and central diaphragm and silencing apparatus lower casing and central diaphragm form is communicated with, the direction that is oriented catalysis device of described ram's horns.Can effectively shunt processing to air-flow, make the air-flow after shunting mutually interfere and improve acoustical absorptivity.
As preferably, the side of described outlet pipe is provided with connecting tube, and described connecting tube is communicated with outlet pipe.Make fresh air enter into outlet pipe by connecting tube, after the air-flow in outlet pipe mixes with fresh air, can further improve transformation efficiency by catalysis device.
As preferably, the inner side of described silencing apparatus upper casing is provided with thermal baffle, and the inner side of described silencing apparatus lower casing is provided with lower thermal baffle, between described upper thermal baffle and silencing apparatus upper casing and between lower thermal baffle and silencing apparatus lower casing, is provided with high heat-resistant material.The design of upper thermal baffle and lower thermal baffle, not only can improve the firm degree of upper casing and lower casing, can also improve the effect of heat insulation of silencing apparatus upper casing and silencing apparatus lower casing by glass fibre simultaneously.
As preferably, described high heat-resistant material is glass fibre.Glass fibre is a kind of Inorganic Non-metallic Materials of excellent performance, of a great variety, has good insulating, heat resistance is strong, corrosion resistance good, and the feature that mechanical strength is high, so can further improve effect of heat insulation.
As preferably, the outside of described silencing apparatus upper casing is provided with mounting bracket, and the position of described mounting bracket is a side that is provided with outlet pipe.To between installation, combine with outlet pipe, the installation of whole device can more be stablized firmly.
The invention has the beneficial effects as follows: make it safe and reliable by the design of spark arrester, environmental protection; Design by upper thermal baffle and lower thermal baffle makes its good heat-insulation effect, long service life; Make its acoustical absorptivity high by the design of ram's horns and through hole, soundproof effect is good; Make the transformation efficiency of its air-flow high by the design of metal beehive catalyst converter and guide plate, purifying ability is strong; By mounting bracket and matching of outlet pipe, it is installed firmly stable.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is cross-sectional view of the present invention;
Fig. 4 is internal structure schematic diagram of the present invention.
In figure: 1. connecting tube, 2. outlet pipe, 3. silencing apparatus lower casing, 4. mounting bracket, 5. steam outlet pipe, 6. spark arrester, 7. silencing apparatus upper casing, 8. guide plate, 9. goes up thermal baffle, 10. glass fibre, 11. times thermal baffles, 12. heat insulating tubes, 13. metal beehive catalyst converters, 14. suction tude, 15. inner bag lower casings, 16. inner bag upper casings, 17. through holes, 18. ram's hornss, 19. central diaphragms.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As Fig. 1, Fig. 2, Fig. 3, in embodiment described in Fig. 4, a kind of exhaust purging muffler, comprise silencing apparatus upper casing 7, silencing apparatus lower casing 3, central diaphragm 19, outlet pipe 2 and steam outlet pipe 5, central diaphragm 19 is placed between silencing apparatus upper casing 7 and silencing apparatus lower casing 3, silencing apparatus upper casing 7, silencing apparatus lower casing 3 and central diaphragm 19 seamless links, central diaphragm 19 is provided with suction tude 14, suction tude 14 is integrated with central diaphragm 19, one end of suction tude 14 connects outlet pipe 2, suction tude 14 and outlet pipe 2 seamless links, the other end of suction tude 14 is communicated with the space that silencing apparatus lower casing 3 and central diaphragm 19 form, the other end place near suction tude 14 on central diaphragm 19 is provided with catalysis device, on central diaphragm 19, be also provided with interior bile duct, interior bile duct and central diaphragm 19 are integrated, one end of interior bile duct connects steam outlet pipe 5, interior bile duct and steam outlet pipe 5 seamless links, the other end of interior bile duct is communicated with the space that silencing apparatus upper casing 7 and central diaphragm 19 form, in steam outlet pipe 5, be provided with spark arrester 6, spark arrester 6 is inserted in steam outlet pipe 5 and steam outlet pipe 5 interference fit, and be connected with steam outlet pipe 5 bolts.Wherein: on central diaphragm 19, be also provided with three through holes 17 and ram's horns 18, ram's horns 18 is integrated with central diaphragm 19, ram's horns 18 be shaped as U-shaped, the space that the space that the two ends of ram's horns 18 all form with silencing apparatus upper casing 7 and central diaphragm 19 and silencing apparatus lower casing 3 and central diaphragm 19 form is communicated with, the direction that is oriented catalysis device of ram's horns 18, the side of outlet pipe 2 is provided with connecting tube 1, connecting tube 1 is communicated with outlet pipe 2, connecting tube 1 is integrated with outlet pipe 2, in three through holes 17 wherein two be distributed in guide plate 8 one sides, another one is distributed in ram's horns 18 1 sides.
As Fig. 3, shown in Fig. 4, catalysis device is placed between suction tude 14 and interior bile duct, catalysis device comprises metal beehive catalyst converter 13 and two guide plates 8, being shaped as of metal beehive catalyst converter 13 is cylindrical, the outside of metal beehive catalyst converter 13 is provided with heat insulating tube 12, heat insulating tube 12 is arranged on central diaphragm 19, metal beehive catalyst converter 13 is arranged in heat insulating tube 12, guide plate 8 is arranged on central diaphragm 19 and is placed in metal beehive catalyst converter 13 tops, guide plate 8 and central diaphragm 19 seamless links, metal beehive catalyst converter 13, heat insulating tube 12 and guide plate 8 distribute with the plane symmetry at central diaphragm 19 places, the complete covering metal honeycomb catalyst converter 13 of guide plate 8, guide plate 8 is provided with targeting port, the direction that is oriented inside bile duct of targeting port.
As shown in Figure 4, interior bile duct comprises inner bag upper casing 16 and inner bag lower casing 15, the cross section of inner bag upper casing 16 and inner bag lower casing 15 is semicircle, inner bag lower casing 15 is arranged on central diaphragm 19 and is placed in silencing apparatus lower casing 3 and space one side that central diaphragm 19 forms, one end of inner bag lower casing 15 is connected with steam outlet pipe 5, the other end of inner bag lower casing 15 and central diaphragm 19 seamless links, inner bag upper casing 16 is arranged on central diaphragm 19 and is placed in silencing apparatus upper casing 7 and space one side that central diaphragm 19 forms, one end of inner bag upper casing 16 is connected with steam outlet pipe 5, the other end of inner bag lower casing 15 is provided with opening.Wherein: the structural design of suction tude 14 is consistent with the structural design of interior bile duct.
As shown in Figure 3, the inner side of silencing apparatus upper casing 7 is provided with thermal baffle 9, the inner side of silencing apparatus lower casing 3 is provided with lower thermal baffle 11, between upper thermal baffle 9 and silencing apparatus upper casing 7 and between lower thermal baffle 11 and silencing apparatus lower casing 3, is provided with high heat-resistant material, and high heat-resistant material is glass fibre 10.As shown in Figure 1 and Figure 2, the outside of silencing apparatus upper casing 7 is provided with mounting bracket 4, and the position of mounting bracket 4 is a side that is provided with outlet pipe 2.
In the present invention, the air-flow being entered by outlet pipe 2 mixes with the fresh air that connecting tube 1 enters, enter into the suction tude 14 of central diaphragm 19, because suction tude 14 is communicated with the space that silencing apparatus lower casing 3 and central diaphragm 19 form, so mixed gas enters in the space that silencing apparatus lower casing 3 and central diaphragm 19 form, part air-flow enters in the space that silencing apparatus upper casing 7 and central diaphragm 19 form by through hole 17 shunting, part air-flow enters in the space that silencing apparatus upper casing 7 and central diaphragm 19 form by ram's horns 18 shunting, most of air-flow enters into metal beehive catalyst converter 13 by guide plate 8 and changes, harmful gas in air-flow is processed, enter in the space that silencing apparatus upper casing 7 and central diaphragm 19 form, meanwhile, in the space that silencing apparatus upper casing 7 and central diaphragm 19 form, harmful gas also can enter in the space that silencing apparatus lower casing 3 and central diaphragm 19 form through metal beehive catalyst converter 13.Process air-flow later and enter into interior bile duct from the opening of inner bag upper casing 16, the air-flow of interior bile duct is discharged from steam outlet pipe 5, owing to being provided with spark arrester 6 in steam outlet pipe 5, absorb spark by spark arrester 6, can ensure to discharge the Security of air-flow, thereby ensure the safety reliability of this device.The triage operator that air-flow carries out on central diaphragm 19, makes air-flow that sufficient interference can occur, and reaches the object of noise elimination noise reduction.
Claims (10)
1. an exhaust purging muffler, it is characterized in that, comprise silencing apparatus upper casing (7), silencing apparatus lower casing (3), central diaphragm (19), outlet pipe (2) and steam outlet pipe (5), described central diaphragm (19) is placed between silencing apparatus upper casing (7) and silencing apparatus lower casing (3), described silencing apparatus upper casing (7), silencing apparatus lower casing (3) and central diaphragm (19) seamless link, described central diaphragm (19) is provided with suction tude (14), one end of described suction tude (14) connects outlet pipe (2), the other end of described suction tude (14) is communicated with the space that silencing apparatus lower casing (3) and central diaphragm (19) form, the upper the other end place near suction tude (14) of described central diaphragm (19) is provided with catalysis device, on described central diaphragm (19), be also provided with interior bile duct, one end of described interior bile duct connects steam outlet pipe (5), the other end of described interior bile duct is communicated with the space that silencing apparatus upper casing (7) and central diaphragm (19) form, in described steam outlet pipe (5), be provided with spark arrester (6).
2. a kind of exhaust purging muffler according to claim 1, it is characterized in that, described catalysis device is placed between suction tude (14) and interior bile duct, described catalysis device comprises metal beehive catalyst converter (13) and two guide plates (8), being shaped as of described metal beehive catalyst converter (13) is cylindrical, the outside of described metal beehive catalyst converter (13) is provided with heat insulating tube (12), described heat insulating tube (12) is arranged on central diaphragm (19), described metal beehive catalyst converter (13) is arranged in heat insulating tube (12), described guide plate (8) is arranged on central diaphragm (19) above and is placed in metal beehive catalyst converter (13) top, described metal beehive catalyst converter (13), heat insulating tube (12) and guide plate (8) distribute with the plane symmetry at central diaphragm (19) place.
3. a kind of exhaust purging muffler according to claim 2, it is characterized in that, described guide plate (8) is covering metal honeycomb catalyst converter (13) completely, described guide plate (8) is provided with targeting port, the direction that is oriented inside bile duct of described targeting port.
4. according to a kind of exhaust purging muffler described in claim 1 or 2 or 3, it is characterized in that, described interior bile duct comprises inner bag upper casing (16) and inner bag lower casing (15), the cross section of described inner bag upper casing (16) and inner bag lower casing (15) is semicircle, it is upper and be placed in space one side that silencing apparatus lower casing (3) and central diaphragm (19) form that described inner bag lower casing (15) is arranged on central diaphragm (19), one end of described inner bag lower casing (15) is connected with steam outlet pipe (5), the other end of described inner bag lower casing (15) and central diaphragm (19) seamless link, it is upper and be placed in space one side that silencing apparatus upper casing (7) and central diaphragm (19) form that described inner bag upper casing (16) is arranged on central diaphragm (19), one end of described inner bag upper casing (16) is connected with steam outlet pipe (5), the other end of described inner bag upper casing (16) is provided with opening.
5. according to a kind of exhaust purging muffler described in claim 1 or 2 or 3, it is characterized in that, described central diaphragm (19) is provided with some through holes (17).
6. according to a kind of exhaust purging muffler described in claim 1 or 2 or 3, it is characterized in that, described central diaphragm (19) is provided with ram's horns (18), described ram's horns (18) be shaped as U-shaped, the space that the space that the two ends of described ram's horns (18) all form with silencing apparatus upper casing (7) and central diaphragm (19) and silencing apparatus lower casing (3) and central diaphragm (19) form is communicated with, the direction that is oriented catalysis device of described ram's horns (18).
7. a kind of exhaust purging muffler according to claim 1, is characterized in that, the side of described outlet pipe (2) is provided with connecting tube (1), and described connecting tube (1) is communicated with outlet pipe (2).
8. a kind of exhaust purging muffler according to claim 1, it is characterized in that, the inner side of described silencing apparatus upper casing (7) is provided with thermal baffle (9), the inner side of described silencing apparatus lower casing (3) is provided with lower thermal baffle (11), between described upper thermal baffle (9) and silencing apparatus upper casing (7) and between lower thermal baffle (11) and silencing apparatus lower casing (3), is provided with high heat-resistant material.
9. a kind of exhaust purging muffler according to claim 8, is characterized in that, described high heat-resistant material is glass fibre (10).
10. a kind of exhaust purging muffler according to claim 1, it is characterized in that, the outside of described silencing apparatus upper casing (7) is provided with mounting bracket (4), and the position of described mounting bracket (4) is for being provided with a side of outlet pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175935.3A CN104088685B (en) | 2014-04-28 | 2014-04-28 | A kind of exhaust purging muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175935.3A CN104088685B (en) | 2014-04-28 | 2014-04-28 | A kind of exhaust purging muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104088685A true CN104088685A (en) | 2014-10-08 |
| CN104088685B CN104088685B (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410175935.3A Expired - Fee Related CN104088685B (en) | 2014-04-28 | 2014-04-28 | A kind of exhaust purging muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104088685B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065535A (en) * | 2020-08-28 | 2020-12-11 | 重庆浩歌机电有限公司 | Silencer for variable-frequency gasoline generator |
| CN113818950A (en) * | 2021-08-04 | 2021-12-21 | 宁波亿超消音科技有限公司 | Silencer capable of purifying gas |
| CN113914971A (en) * | 2021-08-16 | 2022-01-11 | 宁波亿超消音科技有限公司 | Silencer |
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| CN2317314Y (en) * | 1998-01-21 | 1999-05-05 | 赵旭葵 | Strengthening tail gas purifier for car |
| US20050028516A1 (en) * | 2003-08-06 | 2005-02-10 | Andreas Stihl Ag & Co. | Exhaust gas muffler |
| JP2010528228A (en) * | 2007-05-25 | 2010-08-19 | ケムメル，レファート | System and method for treating diesel exhaust particulate matter |
| DE202012011813U1 (en) * | 2012-12-10 | 2013-01-14 | Liebherr-Werk Ehingen Gmbh | aftertreatment system |
| CN203867658U (en) * | 2014-04-28 | 2014-10-08 | 宁波亿超消音科技有限公司 | Exhaust purification silencer |
-
2014
- 2014-04-28 CN CN201410175935.3A patent/CN104088685B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2317314Y (en) * | 1998-01-21 | 1999-05-05 | 赵旭葵 | Strengthening tail gas purifier for car |
| US20050028516A1 (en) * | 2003-08-06 | 2005-02-10 | Andreas Stihl Ag & Co. | Exhaust gas muffler |
| JP2010528228A (en) * | 2007-05-25 | 2010-08-19 | ケムメル，レファート | System and method for treating diesel exhaust particulate matter |
| DE202012011813U1 (en) * | 2012-12-10 | 2013-01-14 | Liebherr-Werk Ehingen Gmbh | aftertreatment system |
| CN203867658U (en) * | 2014-04-28 | 2014-10-08 | 宁波亿超消音科技有限公司 | Exhaust purification silencer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065535A (en) * | 2020-08-28 | 2020-12-11 | 重庆浩歌机电有限公司 | Silencer for variable-frequency gasoline generator |
| CN112065535B (en) * | 2020-08-28 | 2023-11-10 | 重庆浩歌机电有限公司 | Muffler for variable-frequency gasoline generator |
| CN113818950A (en) * | 2021-08-04 | 2021-12-21 | 宁波亿超消音科技有限公司 | Silencer capable of purifying gas |
| CN113818950B (en) * | 2021-08-04 | 2022-08-30 | 宁波亿超消音科技有限公司 | Silencer capable of purifying gas |
| CN113914971A (en) * | 2021-08-16 | 2022-01-11 | 宁波亿超消音科技有限公司 | Silencer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104088685B (en) | 2016-08-03 |
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