
Acoustics - Determination Of High-frequency Sound Power Levels Emitted By Machinery And Equipment (iso/dis 9295:2013)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Acoustics - Determination Of High-frequency Sound Power Levels Emitted By Machinery And Equipment (iso/dis 9295:2013)
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频