标题: BS EN 16272-2-2012 [打印本页] 作者: ygs67 时间: 2016-8-29 11:52:51 标题: BS EN 16272-2-2012
BS EN 16272-2-2012 Railway applications. Track. Noise barriers and related devices acting on airborne sound propagation. Test method for determining the acoustic performance. Intrinsic characteristics. Airborne sound insulation in the laboratory under diffuse sound field co 作者: admin 时间: 2016-8-29 16:09:03