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It can be protective when connect the wire inversely or wrong.
具有电源线接反接错的保护功能。
youdao
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Each wire is galvanized and the cable is covered with a protective coating.
每根钢丝进行了镀锌处理，悬索也要涂上防腐层。
youdao
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Each wire is galvanized and the cable is covered with a protective coating.
每根钢丝进行了镀锌处理，悬索也要涂上防腐层。
youdao