derrick chain的中文,翻译,解释,例句
derrick chain
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A shrill whistle rang out as a signal, a man over at the engine pulled a lever, a chain from the derrick was lowered, and the whistle rang out again.
随着一声尖锐的哨响作为信号,机器后面的人拉动手柄,起重机下的铰链徐徐降下,然后又是一声哨响。
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derrick chain:吊[货]链
井架斜牵条 derrick brace | 吊[货]链 derrick chain | 吊杆式起重机 derrick crane