Metallurgy oil cylinder Aluminium, steel, bronze material ISO9001:2008 approved OEM service ... Wills Machine Co.,LtdProduct nameMetallurgy oil cylinderMaterialSteel,20#,45#,Aluminium, bronzeComposeHydraulic body, Hydraulic piston, Hydraulic RodHydraulic clinder typesPiston ... The hydraulic rod can pull or push, depending on the design of the hydraulic cylinder.Common Applications of Hydraulic ...