... 壁扇 wall fan 穿墙套管 wall feed-through sleeve 壁膜 wall film ...
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wall feed-through sleeve 穿墙套管
put arm through the sleeve 将一只手穿进衣袖
through sleeve
通过套筒
以上为机器翻译结果，长、整句建议使用 人工翻译 。
To make the light travel enormous distances, thousands of volts of electricity are sent through the cable's copper sleeve to power repeaters, each the size and roughly the shape of a bluefin tuna.
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