母锥
- 网络die collar;box tap;Hen Tap
母锥-
研究和改进了腐蚀油管打捞工具套铣母锥和卡瓦捞筒，提高了对腐蚀油管的打捞成功率。
Researched and improved corroded tubing fishing tools : Milling die and Slip overshot , improved corroded tubing salvage success rate .
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母锥是一种专门从油管、钻杆等管状落物外壁进行造扣打捞的工具。
The box taps is a special external tool cutting thread and fishing externally from dropped object such as tubing , drill pipe .