: Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.

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ISO9001 Approval Symmetrix Drilling System , OD 194mm DTH Drilling System

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Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.

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ISO9001 Approval Symmetrix Drilling System , OD 194mm DTH Drilling System

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ISO9001 Approval Symmetrix Drilling System , OD 194mm DTH Drilling System

O.D. 194mm Concentric overburden drill bit with blocks Specification 1.Face: Flat,Convex,Concave,Drop-center. 2.Carbide Button Shape: Spherical,Semi-ballistic,Ballistic and Two-step 3.Bit Shank: COP64...

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symmetrix drilling system

concentric drilling system

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