... ,our company mainly produces all kinds of tungsten carbide solid tubes, strips, mining tools, drawing dies, cutting tool tips, and various ... the drills for heavy-duty rock drill: detachable bits used for deep hole drilling, rock drill trolley etc.YG11CK4014.0-- ... 2020≥86.5Qualified for hard rock drilling, steel bars with high compression ratios, pipe drawing, punching tools, core cabinet of powder ...