... 滑轮组吊车 pulley block hoist 链滑轮组 chain pulley block 舱口滑轮组 hatch whip ...
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electric chain pulley block 电动葫芦
hand chain pulley block 手拉葫芦
chain block pulley 链滑轮
Steel column is fixed to special jig, slipping below the installation position by chain block and lifting by pulley block and windlass.
将钢骨柱固定在专用胎架上，通过倒链滑移至安装点下方后，采用滑轮组和卷扬机进行提升就位。
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