... certificated 3. Exprienced welding workers 4. Automative welding design ALUMINIUM WELDING We are specialists in the welding processes of aluminium ... steel, etc.2. Machining processes: Metal fabrication, machining, welding, forming, shaping, punching, drilling, turning, milling, grinding, ... company:Jinan Rainbow Metalwork Co.,Ltd is expert in aluminium welding. We have professional team design and ...