pulley block
短语词组
- pulley y block 滑轮组
- electric pulley -block 电动葫芦;电动滑车组
- pulley -block luffing gear 升降支臂用滑轮组
- tension pulley block 张紧滑车;张紧滑轮
- double iron pulley block 双轮铁滑车
- twin pulley block 双滑轮组
- and wormwheel pulley block 蜗杆蜗轮滑车组
- Pulley Block Hook 滑轮群拉钩 返回 pulley block