发动机排气噪声是整车噪声的主要噪声源之一。
The exhaust noise of engine is one of the main noise sources of automobile noise.
发动机排气噪声是汽车噪声中一个主要声源，消声器是控制排气噪声的一个重要方法。
Engine exhaust noise is one of the main sources of automobile noise, and using of silencer is an important method controlling exhaust noise.
根据特种发动机排气噪声的特性和消声器的安装要求，设计了一个组合式排气消声器。
According to the exhaust noise characteristics of special engine and the installation request of exhaust muffler, the exhaust muffler for special engine was designed.
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