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for subject
Drilling
containing
横梁
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all forms
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in specified order only
Chinese
English
井架底座横大梁
spreader
横梁
spreader
横梁
spreader bar
横梁
cross grip
横梁
固定卡子
beam clamp
钻台
横梁
derrick floor sills
钻机绞车顶部
横梁
head board
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