... ability 3,high penetration and high speed 4,OEM ... and hard alloy substrate, and is synthesized through agglomeration of diamond micropowder and ... condition of ultrahigh pressure and high temperature (60,000 ... resistance, good heat resistance and impact resistance. 3,It is ... field of petroleum bit, coalfield and geological drilling, etc. 4,Available ... Wedge series. Other D*H and shape is available as per your ...