ygs67 发表于 2016-8-29 13:52:42

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

admin 发表于 2016-8-29 16:10:39

谢谢您的分享，金币已奖励!
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