... materials, also used in welding copper alloy, gold, silv DNY-10, DNY-16, DNY-25, DNY-35 movable hand held spot welderCharacteristics & Applications ... : Supply two kinds of cooling model spot welder: self-cooled and air cooled.Widely used in welding ... Transformer: Self-cooled; Cable, electrode: Water-cooled DNY-25 movable hand held spot welder