manhole seal

读音:英 [] 美[]

manhole seal 基本解释

人孔密封

重点词汇

manhole n. 人孔 [化] 人孔; 进人孔

seal n. 密封;印章;海豹;封条 v. 密封;盖章;决定;封上(信封)


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更新时间:2026-11-01 01:53:46
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