... Stamping PartsLoad Type: CompressionMaterial: Steel,Brass,Matel,EtcUsage: Automobile;Auto;CarCertificate: ISO9001, TS/16949Continuous Coil Spring; 1.Material:steel ... coating,neikel plating,chrome plating,zinc plating,etc and We can make according to your design7Production euipmentproduction ... lines1) The lost-wax casting of stainless steel and heat-resisting steel with silica-gel shell made of ...