... produces all kinds of tungsten carbide solid tubes, strips, mining tools, drawing dies, cutting tool tips, and various non-standard ... the drills for heavy-duty rock drill: detachable bits used for deep hole drilling, rock drill trolley etc.YG11CK4014.0--14. ... drilling, steel bars with high compression ratios, pipe drawing, punching tools, core cabinet of powder metallurgy automatic molders etc.YG16C 13 ...