... speed 4.reasonable pric Impregnated core drill bit(BQ,NQ,HQ,PQ) Impregnated core bits are widely used in mineral exploration ... -AWT2-10166mm6x7-3/4NWD-4,HWD-4BX-BWT2-11676mm3-1/2x2-1/8AWC-3,BWC-3,NWC-3,NX-NWT2-13186mm4 ... -5/8x3AQ,BQ,NQ,HQ,PQPX-PWT2-146101mm5-3/4x4NQ2,HQ2SX- ... 76116mm7-3/4x5-7/8BQ-3,NQ-3,HQ-3,PQ-3UX-UWT6-86131mm10x7-1/2SWFZX-ZWT6-101146mm UWF T6-116 ZWF ...