英语词汇“helper grade”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	helper grade
释义	helper grade helper grade [′hel·pər ‚grād] (mining engineering) A grade on which helper engines are required to assist road locomotives. Also known as pusher grade.
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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。