词语双轮滑车
解释double block
double block〔名词〕双轮滑车详细»
double block〔名词〕双并滑车详细»
double block〔名词〕双层卷筒,双轮滑车详细»
double block双轮滑车详细»
双轮滑车double block;double tackle详细»
双轮滑车double block;double sheave pulley详细»
双轮滑车double block详细»