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旋转钻和顿钻
两用钻机
dril.
combination drill
;
combination rig
;
dual system
两用钻机
oil
combination rig
tech.
dual system
两用 钻机
:
14 phrases
in 5 subjects
Drilling
3
Electric machinery
3
Engineering geology
1
Shipbuilding
1
Technology
6
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