... equipment oil cylinder 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 ... are used in almost all types of construction equipment like as excavators, bulldozers, back hoes, cranes ...