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Product type:Oil Drilling Equipments and Parts--Drill Bits
 
Name:Three-cone bit
Item:ydaer_1
Description:

The Diamond Drilling Bits conforming with standard API Spec 7

Nominal diameter (in): 4 ~ 17 1/2  

Formation: from extremely soft to Medium Hard API 

reg. pin size (in): 2 3/8, 2 7/8 ,3 1/2 ,4 1/2 ,6 5/8.

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