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Red light shows the circuit of lightning protection has been out of service.
红灯亮时说明避雷器电路已在雷击保护时失效。
youdao
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The electric circuit service only need open at the beginning of the effect strainer.
电路维修只需打开初效过滤网。
youdao
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The electric circuit service only need open at the beginning of the effect strainer.
电路维修只需打开初效过滤网。
youdao