[ 复数 pulleys 第三人称单数 pulleys 现在分词 pulleying 过去式 pulleyed 过去分词 pulleyed ]
P ulley dlameter 曳引轮直径
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同义词: pulley-block block
以上来源于: WordNet
N-COUNT A pulley is a device consisting of a wheel over which a rope or chain is pulled in order to lift heavy objects. 滑轮
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