... medium adopts many kinds of materials,such as inorganic fiber,Resin-impregnated paper and stainless steel wire mesh.3 ... can design, manufacture and export water filter,air filter,oil filter,active carbon filter,thread wound filter,filter cartridge,filter ... more than 15 countries, including Canada, USA, Australia, Italy, Hungary, Thailand , Vietnam, Yemen, Venezuela, Iran, Bangladesh, Georgia, HK etc. ...