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to phrases
冲击钻杆
earth.sc.
boring bar
eng.geol.
percussion drill stem
;
percussion jumper
;
sinker bar
tech.
jumper
冲击
式
钻杆
tech.
sinker bar
冲击钻杆:
24 phrases
in 6 subjects
Architecture
1
Earth sciences
1
Electronics
1
Engineering geology
5
Oil / petroleum
1
Technology
15
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