
Electroacoustics - Audiometric Equipment - Part 1: Equipment For Pure-Tone Audiometry (Iec 60645-1:2012)
出版:Osterreichisches Normungsinstitut

专家解读视频
Electroacoustics - Audiometric Equipment - Part 1: Equipment For Pure-Tone Audiometry (Iec 60645-1:2012)
出版:Osterreichisches Normungsinstitut
专家解读视频