... speed 4.reasonable pric Impregnated core drill bit(BQ,NQ,HQ,PQ) Impregnated core bits are widely used in mineral exploration ... Ream ShellSwedishCore BarrelsSwedishCasingShoeCasing BitLarge SeriesCore BarrelsTEW, TAW,TBWRX-RWT2-7645mm2-3/4x3-7/8EWT,AWT,BWT,NWT,HWTEX-EWT2-8655mm4x5-1 ... -3,BWC-3,NWC-3,NX-NWT2-13186mm4-5/8x3AQ,BQ,NQ,HQ,PQPX-PWT2-146101mm5-3/4x4NQ2,HQ2SX-SWT6-76116mm7-3/4x5-7/8BQ-3,NQ-3,HQ-3 ...