when the sound waves incident into it, it can cause gaps in the air vibration; the viscous drag due to air friction and pore walls, so that a considerable part of the sound energy into heat energy has been consumed.
Details:
1.have good quality .
2.have different kinds of shapes and different colors
3.Packing: according to customer's request.
4.Special requirements on design, logo and color are welcome. OEM design is available
5.Super quality and competitive price are ensured
6.Fashionable and attractive promotional/gift/toy products.
7.Frankly speaking, it's really a good choice for you
Category: Packaging -> Metal wrappings
Changzhou DayeTengfei Sponge Co.,Ltd |
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| Street: | Building8, Nanyang Business Plaza, Wujin hutang | ||||||
| City: | changzhou | ||||||
| Postal code: | 213161 | ||||||
| Country: | China | ||||||
| Phone: | +86 0519 86302982 | ||||||
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Contact person |
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| Name and Surname: | Eva Wang | ||||||
| Phone: | +86 0519 86302982 | ||||||
| Mobile: | +86 13775080069 | ||||||