... of the Y3107/M715 PDC drill bit are as following:1.using a self-sharp-type sintering in tungsten carbide impregnated ... .4136,127,517,537,617,6376 1/2165.1126,127,517,537,617,6377 1/2190.5126,136,216,227,517 ... 537,617,6379 7/8250.8127,517,537,617,63712 1/4311.1114,126,127,517,537,617,63713 5/8346117 ... 537,617,63715381124,517,537,617,63715 1/2393.7124,517,537,617,63717 1/2444.5114 117 124 126 21622558.8124 ...