material of PDC bit
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6 straight or spiral blades,high density cutters ,deep junk sloe ;Available with back row curtters to restrict cutting depth and rewduce torque fluctuation and extend bit service life ;Applicable to drill in soft to medium hard for mation with small abrasive layers as well as directional drilling and angle building
6 straight or spiral blades,high density cutters ,deep junk sloe ;Available with back row curtters to restrict cutting depth and rewduce torque fluctuation and extend bit service life ;Applicable to drill in soft to medium hard for mation with small abrasive layers as well as directional drilling and angle building
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