英语词汇“trolley beam”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	trolley beam
释义	trolley beam trolley beam An exposed steel beam, attached to the underside of the structure above; provides support for and acts as a track for a trolley crane.
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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。