
Road Traffic Noise Reducing Devices - Test Method For Determining The Acoustic Performance - Part 4: Intrinsic Characteristics - In Situ Values Of Sound Diffraction
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Road Traffic Noise Reducing Devices - Test Method For Determining The Acoustic Performance - Part 4: Intrinsic Characteristics - In Situ Values Of Sound Diffraction
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频