... :ISO;BV Name(ISO9001:2008 and BV certification)compressed colour wool feltDensity0.14-0.44g/cm3Specification1m x ... sound-insulation,quakeproof,seal, heat-insulationUseIt is widlely used for machinery ,mechanics & electronic,chemical industry,cement industry,light ... Ali and BV company . The production is acceptable for the way of mechanism,electronechanical,spaceflight, aviation,shipping,training ...