英语词汇“grade ring”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	grade ring
释义	grade ring grade ring A precast concrete ring at the top of a manhole; used to adjust the top of the manhole so that it is set at the proper angle.
随便看	eppjp eppk e-ppl eppl epple eppley administration building eppley institute eppley laboratory inc. eppley pyrheliometer eppm eppmc eppmsi eppn eppo eppoa eppog epposi eppp epppl eppr epprd epprep epprp epprr epps

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