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for subject
Drilling
containing
滑轮 组
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all forms
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in specified order only
Chinese
English
吊升用动、定
滑轮组
block and fall
在
滑轮组
上穿装大绳
的道数
string
定滑轮和动
滑轮组
block and tackle
提升系统
滑轮组
line string of hoist system
滑轮组
multiple pulley
滑轮组
rope block
滑轮组
fleet
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