... 3.0-10.mm copper 2. aluminum rod welding /soldering copper wire SZ-158 Hydraulic Cold welding machine / oxygen-free copper rod welding equipment ... . Widely used in the cold welding for the wire of copper, aluminum, gold, silver, nickel, and other non-ferrous metal ... .Other product maintenance tracking services. Hydraulic Cold welding machine / oxygen-free copper rod welding equipment welding set