标题: BS EN 16272-6-2014 [打印本页] 作者: ygs67 时间: 2016-8-29 13:52:42 标题: BS EN 16272-6-2014
BS EN 16272-6-2014 Railway Applications - Track - Noise Barriers And Related Devices Acting On Airborne Sound Propagation - Test Method For Determining The Acoustic Performance - Part 6: Intrinsic Characteristics - In Situ Values Of Airborne Sound Insulation Under Direct Sound Field Conditions 作者: admin 时间: 2016-8-29 16:10:39