lever block 杠杆式拉力滑车 ; 杆滑车 ; 手扳葫芦 ; 手扳起重器

hand chain block and lever 手动葫芦

Rope lever block 钢丝绳手扳葫芦

Chain lever block 环链手扳葫芦

nozzle tube lever block 嘴管杆垫块

lengthwise feed lever slide block 纵向进给杆滑块

lever r block 杠杆式拉力滑车

lever pulley block 手板葫芦