- flush coupled-type drill string
- 平: flat; level; even; smooth
- 接: come into contact with; come ...
- 钻具: drilling tool; drilling rig
- 平接: abutment joint; bell and plain end joint; blunt ligation; butt joint; butted joint; butting; even joint; flat connect; flat grafting; flush joint; half lap scarf; jumping
- 接钻杆: [口语] stacks
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