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.
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英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。