lawn mower,noise clipper,noise killer,noise limiter

An analysis on the fan noise pollution in paper mill and its control;

纸厂风机噪声污染分析与控制方法

Transformer substation noise pollution assessment and its control;

变电站环境噪声评价与防治

One approach to reducing noise of automobile rear axle gear assembling;

一种降低汽车后桥装配中齿轮噪声的途径