... , buildings, air, metals, switch the trade. Propety And FunctionConvex welding machine is widely applied in automobile and aviation, mechanical building, metals ... , especially suitable for heavy plate welding. "the warm glow current time," for the first welding , "welding time, welding current" for the welding , "to fire back ... :28Convex:3423528550402-120613030≤168684.5+4.5 Multi-spot Welding Machine