The Phun Forum Experience You Wont Regret It

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电气 什么是selv和pelv？felv是什么意思保护特低电压pelv (protective extra low voltage, 缩写 pelv) ，只作为保护接地系统的安全特低电压用防护。安全特低电压 selv (safety extra low.

The Phun Forum Experience You Wont Regret It

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The Phun Forum Experience You Wont Regret It
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