8 1/2inch Steel Tooth Drill Bits
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Factory 8 1/2 inch IADC 127 Tricone Bits Steel Tooth Roller Cone Bits
Type: Milled Steel Tooth Drill Bit
Material:Carbide
Use: Tunnel construction Energy drilling
Manufacturer: Zhengzhou Sungood New Material Technology Co., LTD
Brand: ZZSEGU
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