本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。

This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits.

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本文分析了交流接触器无声运行的工作原理，提出了两类电气控制线路。这是一种实用的节能技术。

This paper introduced the principle of AC-contactor working without noise and offered two series electrical controlling circuits. It is a practicable and energy-saving technology.

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如果你是一个电气工程类的承包商，你手下的雇员给吊扇走线的方法肯定和其它电工大同小异。

If you're an electrical contractor, your employees probably wirea ceiling fan the same way other electricians do.

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