China Drill Bit, Drill Bit Manufacturers, Suppliers, Price ...
Q Series Natural Diamond Set Reaming Shells for Protecting Drill Bit ' s Outer Diameter. Material: Diamond And Steel Body. Design: Natrual Diamond E Or Tungsten Carbide Surfac Set. Available Item: Q-Series,T-series,B-series,NWG,HMLC Ect. Position: Connect With The Drill Core Bit.
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