... 3.wearability 4.High efficiency 5.Long service life A,DP Anchor drill bits is introduced,Product name specificationsModelCoupling DimensionnoteDP ... bits32*M12DPM12DP Anchor drill bits32*T16DPT16 B,DP Anchor drill bitsillustration,C,DP Anchor drill bits product features and use, ... the wear-resistance and makes it efficient and long haul.D,Ruilong Consciousness,Quality is the enterprise's foundation of ...