双排滚子链 double row roller chain; doublerowrollerchain; duplex chain; duplex roller cha ..
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duplex chain wheel [机] 双排链轮
duplex roller chain 双排滚子链 ; 双滚子链
duplex polymerase chain reaction 双重聚合酶链反应
N a roller chain having two sets of rollers linked together, used for heavy-duty applications 双滚柱链 [engineering]
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