... tool are tempering, forging, extrusion Etc, eating. 3. diamond saw blades, rill tool’s welding 4. drill bit, coal drill bit ... all kinds of wooden cutters, braze high speed steel saw blades.Hardening equipment:frequency about 40KHZ,smaller can hardening high precision ... machine application: braze all kinds of diamond compact bit, carbide tip, saw blades: braze all kinds of pick bit, drill bit, drill ...