CN106272739A - A kind of environment-friendly active charcoal anti-noise circuit board - Google Patents
A kind of environment-friendly active charcoal anti-noise circuit board Download PDFInfo
- Publication number
- CN106272739A CN106272739A CN201610837610.6A CN201610837610A CN106272739A CN 106272739 A CN106272739 A CN 106272739A CN 201610837610 A CN201610837610 A CN 201610837610A CN 106272739 A CN106272739 A CN 106272739A
- Authority
- CN
- China
- Prior art keywords
- noise
- bamboo
- layer
- circuit board
- environment
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
- B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of environment-friendly active carbon anti-noise circuit board, it is characterised in that include backplane level and panel layer, between described backplane level and panel layer, be provided with anti-noise layer；It is filled with composite adsorption bamboo-carbon layer between described anti-noise layer；The both sides of described panel layer are provided with sealing coat, and described sealing coat is fixing with panel layer to be connected.The anti-noise circuit board of the present invention has simple in construction, it is possible to the advantage effectively reducing noise；The sealing coat of the anti-noise circuit board of the present invention uses bamboo making to form, and composite adsorption bamboo-carbon layer is bamboo charcoal, has low cost, the advantage of environmental protection, and life-time service improves environmental quality, contributes to noise reduction and absorption surrounding air harmful substance.
Description
Technical field
The present invention relates to anti-noise circuit board technical field, it particularly relates to a kind of environment-friendly active carbon anti-noise circuit board.
Background technology
The construction features of currently used anti-noise plate are unsatisfactory for current requirement.And, most reduction noises
Solution is to use to weigh very much and much more expensive, but is not usually suitable for the anti-noise plate of the application region given.
In order to determine Absorption System noise reduce efficiency, should with reference to by UNI 11022 standard propose from
Being reduced performance parameter by the produced sound of test under field condition, UNI 11022 standard is followed as ISO 10847 standard
Guilding principle, i.e. use barrier/noise absorbent medium of being arranged between receiving position and noise source to survey at receiving position
Amount noise in terms of dB (A).The inadaptability of some currently used noise reducing plate is due to the fact that several factor is recognized
For being unessential or the most considered, because they are not controlled by special regulation before new Europe instruction comes into effect
System.Described instruction the most not only regulation sound pollution but also specify all types of environmental pollution, the most all of mainly
The noise reducing plate being made up of the material of high progression must be replaced in estimation to the time of 3 years for about 2 years.
Currently used all types of noise reduction panels are generally made up of following material: within it have vegetation or tyre rubber
The aggregate concrete of granule, there is the timber of rock wool core, there is the steel of rock wool core, there is the aluminum of rock wool core, there is rock wool core
Light-alloy, PMMA polymethyl methacrylate, Merlon, glass, fiber-reinforced polymer, composite/carbon fiber.So
And, it is not always able to meet aesthetic requirement and noise lowers the requirement both.In the above-mentioned type, there is steel and the tool of rock wool core
The aluminum having rock wool core is most-often used.Generally mainly it is made up of metal shell or wooden shell and rock wool core, outside described metal
Shell or wooden shell have a perforation, and perforation being passed through for sound wave, and the acting as of rock wool core absorbs acoustic energy, or more properly absorbs
Energy present in the sound wave of a series of frequencies and whole frequency spectrum.
But, currently used noise reducing plate is of virtually many shortcomings, and described shortcoming can be summarized as follows: about performance
Shortcoming, currently used panel is extremely limited in terms of sound absorption efficiency and life cycle, and life cycle can be estimated as
About 4 years to 5 years；Noise reducing plate needs periodic maintenance, and the periodic maintenance aspect in order to ensure effect of tightening member needs to safeguard work
Make；Installation is complicated and very long；The rock wool insalubrity that used and being the most quickly prohibited.
Summary of the invention
It is an object of the invention to provide a kind of environment-friendly active carbon anti-noise circuit board, upper with overcome currently available technology to exist
State deficiency.
For realizing above-mentioned technical purpose, the technical scheme is that and be achieved in that:
A kind of environment-friendly active carbon anti-noise circuit board, including backplane level and panel layer, is provided with between described backplane level and panel layer
Anti-noise layer；It is filled with composite adsorption bamboo-carbon layer between described anti-noise layer；The both sides of described panel layer are provided with sealing coat, described
Sealing coat and panel layer fixing be connected.
Further, described sealing coat be thickness be the rhombus bamboo chip of 3cm, formed irregular according to the arrangement of rhombus bamboo chip
Diamond-type honeycomb layer.
Further, described sealing coat includes left side sealing coat and right side sealing coat, described left sealing coat and panel
Layer, right sealing coat and panel layer all connect by bamboo nail or Environment-friendlyglue glue are fixing.
Preferably, described composite adsorption bamboo-carbon layer includes some a size of 3mm, bamboo charcoal particle in irregular shape.
Preferably, the bamboo charcoal density of described composite adsorption bamboo-carbon layer is a 3-5 cubic centimetre/cellular unit grid.
Further, described anti-noise layer includes multiple diamond-type honeycomb unit anti-noise plate, described diamond-type honeycomb anti-noise plate
It is distributed between described backplane level and panel layer.
Preferably, described panel layer is the intermediate layer of bamboo.
Preferably, described backplane level is the intermediate layer of bamboo.
The present invention also provides for the processing technology of a kind of environment-friendly active carbon anti-noise circuit board, wherein, described nano active carbon
Anti-noise circuit board is a kind of environment-friendly active carbon anti-noise circuit board described in any of the above, and described manufacture method includes walking as follows
Rapid:
Bamboo cane is cut in S1: blanking, and bamboo cane is spliced in bulk, and fumigates；
S2: the bamboo cane after stifling for splicing in bulk uses rhombus cutting molding be fabricated to division board and rhombus anti-noise plate, and will be every
Received on panel by bamboo nail and/or Environment-friendlyglue glue from plate and rhombus anti-noise plate；
S3: fill bamboo charcoal particle between division board and rhombus anti-noise plate, between adjacent rhombus anti-noise plate；
S4: complex group loads onto lower bamboo plate pressing plate molding；
S5: by trimming after upper and lower bamboo plate zoarium, sanding surface, sprayed fire proofing reagent, dry, packaging.
After using technique scheme, the present invention has following beneficial effect: the anti-noise circuit board of the present invention has knot
Structure is simple, it is possible to the advantage effectively reducing noise；The sealing coat of the anti-noise circuit board of the present invention uses bamboo making to form, compound
Absorption bamboo-carbon layer is bamboo charcoal, has low cost, the advantage of environmental protection, and life-time service will not produce harm to human body.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the structural representation of a kind of environment-friendly active carbon anti-noise circuit board of the embodiment of the present invention；
Fig. 2 is the structural representation of the anti-noise layer of the embodiment of the present invention；
In figure: 1, backplane level；2, composite adsorption bamboo-carbon layer；3, panel layer；4, left sealing coat；5, right sealing coat；6, sealing coat；7、
Anti-noise layer；8, rhombus anti-noise plate.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained, broadly fall into present invention protection
Scope.
As shown in Figure 1-2, a kind of environment-friendly active carbon anti-noise circuit board described in the embodiment of the present invention, including backplane level 1 He
Panel layer 3, is provided with anti-noise layer 7 between described backplane level 1 and panel layer 3；It is filled with composite adsorption between described anti-noise layer 7
Bamboo-carbon layer 2；The both sides of described panel layer 3 are provided with sealing coat 6, and described sealing coat 6 is fixing with panel layer 3 to be connected, described
Sealing coat 6 includes left side sealing coat 4 and right side sealing coat 5, described left sealing coat 4 and panel layer 3, right sealing coat 5 and panel
Layer 3 all connects by bamboo nail or Environment-friendlyglue glue are fixing, and described anti-noise layer 7 includes multiple rhombus anti-noise plate 8, described rhombus
Anti-noise plate 8 is distributed between described backplane level 1 and panel layer 3.
In one embodiment, described sealing coat 6 is the rhombus bamboo chip of thickness 3cm, arranges shape according to rhombus bamboo chip
Become irregular diamond-type honeycomb layer.
In one embodiment, described composite adsorption bamboo-carbon layer includes some a size of 3mm, bamboo in irregular shape
Charcoal granule, it is also possible to be that other have other granules adsorbing function of noise, such as activated carbon granule etc..
In one embodiment, the bamboo charcoal density of described composite adsorption bamboo-carbon layer is 3-5 cubic centimetre/honeycomb list
Unit.
In one embodiment, described panel layer is the intermediate layer of bamboo.
In one embodiment, described backplane level is the intermediate layer of bamboo.
The present invention also provides for the processing technology of a kind of environment-friendly active carbon anti-noise circuit board, wherein, described nano active carbon
Anti-noise circuit board is a kind of environment-friendly active carbon anti-noise circuit board described in any of the above, and described manufacture method includes walking as follows
Rapid:
Bamboo cane is cut in S1: blanking, and bamboo cane is spliced in bulk, and fumigates；
S2: the bamboo cane after splicing in bulk and fumigate uses rhombus cutting molding to be fabricated to division board and rhombus anti-noise plate, and will
Division board and rhombus anti-noise plate are received on panel by bamboo nail and/or Environment-friendlyglue glue；
S3: fill bamboo charcoal particle between division board and rhombus anti-noise plate, between adjacent rhombus anti-noise plate；
S4: complex group loads onto lower bamboo plate pressing plate molding；
S5: by trimming after upper and lower bamboo plate zoarium, sanding surface, sprayed fire proofing reagent, dry, packaging.
The present invention uses polygon refraction principle, it is possible to polygon refraction audio frequency, hinders sound, it is achieved the effect of dispersion noise,
Noise is reduced to 50 decibel values.The sealing coat of the present invention uses bamboo, it is possible to carry out auxiliary noise and absorption.
The anti-noise circuit board of the present invention has simple in construction, it is possible to the advantage effectively reducing noise；The anti-noise collection of the present invention
The sealing coat becoming plate uses bamboo making to form, and composite adsorption bamboo-carbon layer is bamboo charcoal, has low cost, the advantage of environmental protection,
Life-time service improves environmental quality, contributes to noise reduction and absorption surrounding air harmful substance.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (9)
1. an environment-friendly active carbon anti-noise circuit board, it is characterised in that include backplane level and panel layer, described backplane level dough-making powder
Anti-noise layer it is provided with between flaggy；It is filled with composite adsorption bamboo-carbon layer between described anti-noise layer；The both sides of described panel layer set
Having sealing coat, described sealing coat is fixing with panel layer to be connected.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 1, it is characterised in that described sealing coat is thick
Degree is the rhombus bamboo chip cellular unit of 3cm.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 2, it is characterised in that described sealing coat includes
Left side sealing coat and right side sealing coat, described left sealing coat and panel layer, right sealing coat and panel layer all by bamboo nail or
Environment-friendlyglue glue is fixing to be connected.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 1, it is characterised in that described composite adsorption bamboo
Layer of charcoal includes some a size of 3mm, bamboo charcoal particle in irregular shape.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 4, it is characterised in that described composite adsorption bamboo
The bamboo charcoal density of layer of charcoal is 3-5 cubic centimetre/cellular unit.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 1, it is characterised in that described anti-noise layer includes
Multiple diamond-type honeycomb anti-noise plates, described diamond-type honeycomb anti-noise plate is distributed between described backplane level and panel layer.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 1, it is characterised in that described panel layer is bamboo
The intermediate layer of son.
A kind of environment-friendly active carbon anti-noise circuit board the most according to claim 1, it is characterised in that described backplane level is bamboo
The intermediate layer of son.
9. a processing technology for environment-friendly active carbon anti-noise circuit board, wherein, described nano active carbon anti-noise circuit board is power
Profit requires the arbitrary described a kind of environment-friendly active carbon anti-noise circuit board of 1-8, it is characterised in that described manufacture method includes as follows
Step:
Bamboo cane is cut in S1: blanking, and bamboo cane is spliced in bulk and fumigates；
S2: the bamboo cane after splicing in bulk and fumigate uses rhombus cutting molding to be fabricated to division board and diamond-type honeycomb anti-noise plate,
And division board and diamond-type honeycomb anti-noise plate are received on panel by bamboo nail and/or Environment-friendlyglue glue；
S3: fill bamboo charcoal particle between division board and rhombus anti-noise plate, between adjacent rhombus anti-noise plate；
S4: complex group loads onto lower bamboo plate pressing plate molding；
S5: by trimming after upper and lower bamboo plate zoarium, sanding surface, sprayed fire proofing reagent, dry, packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610837610.6A CN106272739A (en) | 2016-09-21 | 2016-09-21 | A kind of environment-friendly active charcoal anti-noise circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610837610.6A CN106272739A (en) | 2016-09-21 | 2016-09-21 | A kind of environment-friendly active charcoal anti-noise circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106272739A true CN106272739A (en) | 2017-01-04 |
Family
ID=57712863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610837610.6A Pending CN106272739A (en) | 2016-09-21 | 2016-09-21 | A kind of environment-friendly active charcoal anti-noise circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106272739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524993A (en) * | 2019-09-17 | 2019-12-03 | 宁波芯中芯纤维科技有限公司 | A kind of charcoal core plate and its manufacture craft |
| CN113043689A (en) * | 2021-05-06 | 2021-06-29 | 常州伊柯瑞斯装饰材料有限公司 | Composite environment-friendly decorative plate with heat preservation function and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1181517A (en) * | 1997-09-10 | 1999-03-26 | Shinichi Takamiya | Soundproof material and soundproof wall |
| CN1743598A (en) * | 2004-09-03 | 2006-03-08 | 天津市朗明通信科技有限公司 | Bamboo-made wallboard |
| CN201433547Y (en) * | 2009-05-18 | 2010-03-31 | 赵晨 | Floor with advantages of environmental protection, energy conservation and sound insulation |
| CN102644333A (en) * | 2012-04-20 | 2012-08-22 | 上海捷成企业管理集团有限公司 | Honeycomb material made of bamboos |
| CN205498177U (en) * | 2016-03-01 | 2016-08-24 | 安徽三联学院 | A panel for furniture |
| CN206201122U (en) * | 2016-09-21 | 2017-05-31 | 徐永 | A kind of environment-friendly active charcoal anti-noise circuit board |
-
2016
- 2016-09-21 CN CN201610837610.6A patent/CN106272739A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1181517A (en) * | 1997-09-10 | 1999-03-26 | Shinichi Takamiya | Soundproof material and soundproof wall |
| CN1743598A (en) * | 2004-09-03 | 2006-03-08 | 天津市朗明通信科技有限公司 | Bamboo-made wallboard |
| CN201433547Y (en) * | 2009-05-18 | 2010-03-31 | 赵晨 | Floor with advantages of environmental protection, energy conservation and sound insulation |
| CN102644333A (en) * | 2012-04-20 | 2012-08-22 | 上海捷成企业管理集团有限公司 | Honeycomb material made of bamboos |
| CN205498177U (en) * | 2016-03-01 | 2016-08-24 | 安徽三联学院 | A panel for furniture |
| CN206201122U (en) * | 2016-09-21 | 2017-05-31 | 徐永 | A kind of environment-friendly active charcoal anti-noise circuit board |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524993A (en) * | 2019-09-17 | 2019-12-03 | 宁波芯中芯纤维科技有限公司 | A kind of charcoal core plate and its manufacture craft |
| CN113043689A (en) * | 2021-05-06 | 2021-06-29 | 常州伊柯瑞斯装饰材料有限公司 | Composite environment-friendly decorative plate with heat preservation function and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8770344B2 (en) | Acoustic panel | |
| US8708097B2 (en) | Acoustic panel | |
| CN201780778U (en) | Multi-module resistance composite sound insulating board | |
| CN105714944A (en) | Sound absorption bearing plate with square honeycomb-ripple compound structure | |
| CN105821980A (en) | Sound-absorbing loading plate with hexagonal honeycomb-corrugation complex structure | |
| CN1754201B (en) | Sound-absorbing structure using thin film | |
| CN106272739A (en) | A kind of environment-friendly active charcoal anti-noise circuit board | |
| CN201665927U (en) | Low frequency damping and sound insulation structure | |
| CN202299233U (en) | Sound-absorption sound-proof panel | |
| CN208968026U (en) | Sound-insulating structure and air conditioner | |
| CN105358753A (en) | Glass fiber enhanced mineral wool based acoustical tile | |
| KR101323476B1 (en) | Noise protection material for building and structure for noise reduction of between floors and thereof construction method | |
| Connelly et al. | Sound transmission loss of green roofs | |
| CN206189780U (en) | Dalle with absorbing effect | |
| CN206201122U (en) | A kind of environment-friendly active charcoal anti-noise circuit board | |
| JP2004021246A (en) | Sound-absorption structure by specification of particle structure of foamed body | |
| CN106012880A (en) | Inflation-adjustable sound barrier | |
| CN206956968U (en) | A kind of sqouynd absorption lowering noise metope | |
| CN110181884B (en) | Full-frequency acoustic control module | |
| CN202008829U (en) | Multipurpose broadband sound absorber module | |
| CN210508031U (en) | Sound-absorbing light partition | |
| CN210161693U (en) | Full frequency acoustic control module | |
| CN105908853A (en) | Soundproof gypsum board | |
| CN102733953B (en) | Sound arrester applied to engine pedestal | |
| CN206480373U (en) | A kind of steel compound noise reduction board and denoising device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |