- drill-pipe slips
- 钻杆: bull rod; bar; rod; drill st ...
- 瓦: tile; put tiles on a roof; c ...
- 钻杆: bull rod; bar; rod; drill stem; drill pipe; jackrod (手持式风钻); bore rod; boring bar; drilling rod; drilling pipe; drill rod
- 连杆瓦锁销: connecting rod bush lock
- 连杆瓦镗床: con-rod bushing boring-machine
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