- kinds of drilling
- 钻井: borehole; well drilling
- 种类: kind; class; description; ty ...
- 种类: kind; class; description; type; variety 不同种类的刀具 cutters of different kinds; 种类繁多 a great variety
- 钻井: borehole; well drilling 海洋钻井 offshore drilling; 钻井泵 pump; 钻井船 drill ship; offshore drilling rig; 钻井队 drilling crew; drilling team; 钻井工 spudder; 钻井工人 driller; 钻井机 trepan; 钻井平台 rig; an off-shore oil rig; 钻井事故 drilling failure
- 种类物，种类: genus
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