英语词汇“twofold purchase”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	twofold purchase
释义	twofold purchase noun or twofold tackle : a tackle of two double blocks with the standing part of the rope fast to the block from which the hauling part comes < the twofold purchase … is commonly used for hoisting boats — Manual of Seamanship >
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