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单词
flap trap
释义
flap trap
flap trap
[
′flap ‚trap
]
(engineering)
In plumbing, a trap fitted with a hinged flap that permits flow in one direction only, thus preventing backflow.
flap trap
In plumbing, a trap having a hinged flap which allows flow in one direction only, preventing backflow.
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更新时间:2025/9/19 15:37:05