... level transit 水准经纬仪 lever block 杠杆式拉力滑车 lever luffing crane with swing lever 旋臂式俯仰起重机 ...
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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
Lever block trigger for safety 杆杆手板保证安全
low-lever block 低层级区块
lever block for double tackle 握臂穿腿
hand chain block and lever 手动葫芦
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