... 8-35mm 3.High Density,Zero Defects 4.ductile iron piston ring I.Intro:Based on horizontal continuous casting for ... mechanical industries,such as railway vehicle, oil machine,engineering machine,auto parts,compressor, hydraulic and pneumatics,chemical pump, machine tool, ... also supply related products in blank, such as cylinder liner,piston ring,ADI bushing,sealing ring,suction pipe etc. By using ...