这是插件的某种“电源板”，通过对插件声明扩展，其它插件就可以利用这个插件。
This is a sort of "power strip" for a plug-in that others can take advantage of by declaring an extension to it.
一般是由于带电拔插系统中接插件，或电路中电源对地之间短路而引起，此时可采用静态电阻测量法。
General is due to the live system connector plug or circuit between the power-to-ground short-circuit caused by, at this point resistance measurement method can be static.
这种发电机的实践模式是很容易建立使用普通的电源扩展插件。
The practical model of this generator is easy to build using the ordinary power extension plug.
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