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archit.
冲击式钻杆
eng.geol.
重钻杆
;
冲击钻杆
oil
加重杆
;
撞杆
tech.
压载杆
;
冲击
式
钻杆
textile
沉降片座
sinker bar
:
8 phrases
in 2 subjects
Oil / petroleum
5
Technology
3
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