1.11 years OEM manufacturer experience ... 4.100% inspection Item NO. welded steel ringsMaterialsIron, aluminum, steel, copper, plastic, carbon steel, nylon, bronze, solder alloy, ... lathe machine, milling machine, drilling machine, EDM, wire-cutting machine, CNC bending machine etc.Service projectTo ... for us.We are sincerely expecting to cooperate with you. Production Equipments: CNC Machining Center5 ...