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A simple automatic device is floating the way open and closed the trap.
一种简单的自动装置是以浮动的方式开启和关闭疏水阀。
youdao
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The trap made of an old tin can and some wire is an ingenious device.
这个由旧锡罐和一些电线做成的陷阱是一个天才之作。
youdao
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The trap made of an old tin can and some wire is an ingenious device.
这个由旧锡罐和一些电线做成的陷阱是一个天才之作。
youdao