covering coupling
覆盖耦合
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Before the work, should inspect and confirm that various part of wire coupling is good, on control box's outer covering and tag board's cover housing cover is good.
作业前，应检查并确认各部分导线连接良好，控制箱的外壳和接线板上的罩壳盖好。
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