Heavy duty arc welding machine 1.Metal loss reduced 2.Easy arc starting,little spatter, ... .CCC&CE,ISO9001 4.Large scale Heavy duty arc welding machine Technical Parameters1.Inverter frequency is 20 KVA,greatly reducing the ... (L*W*H)730*330*560730*330*560730*330*560 High efficiency heavy duty arc welding machine(CCC&CE)