extension cord ; extension cable
电线延长线 wire extension cord
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电源线延长线 power cord extension cord
按规定检查所有的延长线，使其处于良好的状况。在缠绕存放电线之前，应当先切断电源。
All extension cords should be checked regularly and kept in good condition. Cord should be disconnected from power source before coiling for storage.
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