英语词汇retractable steel joist是什么意思，retractable steel joist的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	retractable steel joist
释义	retractable steel joist　可缩钢梁
随便看	plug-in package plug-in termination plug-in unit plug-ins plug-ins plug-ins plug-to-plug compatibility plug-ugly plug-ugly plug-ugly plug-ugly plugboard plugboard chart plugboard computer plugboard type computer plugcock plugconnection plugcoupled pluggability pluggable unit Plugge's test Plugge's tests plugged plugged plugged

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