... ,stable 3.CCC&CE,ISO9001 4.Large scale Heavy duty arc welding machine Technical Parameters1.Inverter frequency is 20 KVA,greatly ... .It can widely used in acid,basic electrode welding6.Easy arc starting,little spatter,stable current and good shaping7.Adjustable thermal ... (L*W*H)730*330*560730*330*560730*330*560 High efficiency heavy duty arc welding machine(CCC&CE)