... of sawHM drawing diesealing ring, wear-resistance partsheads for electric drillsHM balls with different ODfabric parts, mechanic parts, nozzle ... YG8S.For geological prospecting, coal mining, tipping of electric and air drill for coal bed.YA614.4-15.092Belonging the ... better than YG6.For rough turning, planning, milling and electric drill bits.YG11C14.0-14.487Belonging the coarse tungsten carbide, the ...