- vertical boring
- 垂直: perpendicular; vertical; squ ...
- 钻探: probing; misering; testborin ...
- 垂直钻进: vertical drilling
- 直钻头: straight drill
- 钻探: probing; misering; testboring; drilling; exploration drilling 海底钻探 offshore drilling; 钻探船 drilling vessel; 钻探工 driller; 钻探机 drilling machine; miser; 钻探平台 drilling platform; 钻探作业 drilling operation
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