Large scale hydraulic clinder steel, bronze material ISO9001:2008 approved OEM service,CNC machining Weight:50kg-200kg CompanyDalian Wills Machine Co.,LtdProduct nameCoke ... oven equipment oil cylinderMaterialSteel,20#,45#,Aluminium, bronzeComposeHydraulic body, Hydraulic piston, Hydraulic RodHydraulic clinder typesPiston,plunger ...