... of application. The carefully selected grades of high quality synthetic diamond are distributed in the depth of impregnated bit' ... is required to keep the cost of diamond drilling to a minimum. The optimum diamond size, concentration and matrix type are ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Diamond core bit NQ, HQ, PQ, NQTT, HQWL, T2, T6, NMLC, HMLC