
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)

專家解讀視頻
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)
專家解讀視頻