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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

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