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

brake lever filling block 制动轴轴承

lengthwise feed lever slide block 纵向进给杆滑块

low-lever block 低层级区块

Lever block trigger for safety 杆杆手板保证安全