... operation and safety 4.Heating rapidly 1. metal tube welding: such as copper tube, steel tube, and aluminum ... tube’s butt welding, plug welding and welding sets.2. alloy cutter welding: such as alloy turning, milling cutter ... welding: diamond saw blade welding, marble saw blade welding,woodworking saw blade welding, cut grass piece of welding, cut aluminum welding,4. metal welding: ...