... drainage siphon 倒虹吸管 drainage sump 泄水井 drainage sump 泄水阱 ...
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... pneutronic voltmeter 袖珍伏特计 pneutronic well 泄水井 pneutronic 电动气动的 ...
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... pocket watch 怀表 pocket well 泄水井 pocket 袋 ...
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... drainage well 污水井 drainage well 泄水井 drainage 排水排油 ...
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