教你如何在网上挣钱

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真空滅弧室的使用壽命是多長

發布日期: 2016-03-29

真空滅弧室的使用壽命是多長

  真空滅弧室的壽命可分為真空壽命、電壽命和機械壽命。任一壽命終了,都要更換真空滅弧室。

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