block and tackle
短语词组
- block k and tackle 滑轮组
- chain block and tackle 倒链滑车组
- block and tackle arrangement 起下用滑车系统
- 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 返回 block and tackle