tungsten carbide hemispherical button drill bit, tungsten ...
Button Drill Bit Tungsten Carbide Bits Drill Bit For Well Dth Button Drill Bit 140mm Tungsten Carbide Down The Hole Hammer Bits For Water Well Drilling. US $150.00-$680.00 Piece. 1.0 Pieces (Min. Order) CN Zigong Zhaoqiang Sealing Products Industrial Co., Ltd. 4 YRS. 85.7%. 4.8 (6) 'Excellent service' 'Good service'
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