“出入孔”例句

单词 出入孔
例句 DEFINITIVE EXAMPLES 权威例句〔manhole〕A hole, usually with a cover, through which a person may enter a sewer, boiler, drain, or similar structure.下水道出入孔:一种常带有盖的孔道,人可以由此孔进出排道、锅炉、下水管或类似设施美国传统

 

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