block k and tackle滑轮组
block and tackle system滑轮组
block-and-tackle复滑车;滑车组
block and tackle tacke block绳子或其他柔性材料与滑轮相组合的机件
chain and tackle block链条起重滑车
N（名词） a hoisting device in which a rope or chain is passed around a pair of blocks containing one or more pulleys. The upper block is secured overhead and the lower block supports the load, the effort being applied to the free end of the rope or chain 滑轮组