4. E - Fixed Constructions
  5. 21
  6. B

Zengyuan Shao

E - Fixed Constructions – 21 – B

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Country: China

A tri-cone bit for high rpm drilling applications

E - Fixed Constructions – 21 – B
Patent

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Tri-cone bits for horizontal and hard formation drilling...

E - Fixed Constructions – 21 – B
Patent

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Profile ID: LFCA-PAI-P-1309921

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