The latest style large capacity muffle with special structure has reduced the noise of exhaust gas. A larger air filter is employed to reduce the noise of suction gas.

新型大容量和特殊内部构造消音器降低了排气噪音。采用较大的空气滤器减少了进气噪音。

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Is it my imagination or did the rise of expense-account restaurants purposely building-in conversation-evaporating high-volume noise levels (partly by not building in the architectural elements that muffle them) coincide with the market run-up to 2008?

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