... of hard metal cutters1.standard parts, fastener parts heating. 2. drill steel, drill tool are tempering, forging, extrusion Etc, eating. 3. ... diamond saw blades, rill tool’s welding 4. drill bit, coal drill bit, pick bit’s welding5. braze lathe tool, milling ... saw blades: braze all kinds of pick bit, drill bit, drill rod, coal drill bit, wind drill bit and accessories of mine.2. High frequency ...