Pollution control should run through every stage including design, manufacture, installation use, maintenance and repair, etc.

污染控制要贯穿于整个液压装置的设计、制造、安装、使用、维护和修理等各个阶段。

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Installation filter in power system to control harmonic pollution could effectively reduce the system loss and avoid harmonic resonance or current amplification.

在电网中安装滤波器来治理谐波污染，可以有效地降低系统网损，能够避免谐波谐振或电流放大。

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