... 3.Easy To Operate and Maintenance AC Water-Cooling Spot Welding Machine (DN Series)Features:• Low power consumption of main transformer. ... , Southeast Asia, Middle East, Africa. Certificate: CE,ROHS,GS,ISO9001 Specification: ItemDN-10DN-16DN-25Input voltage(V)220/380220 ... in order to forge welding metal, in the welding process there should always be pressure.Spot Welding: The welding pieces are pressed ...