
Electroacoustics - Hearing Aids - Part 4: Induction Loop Systems For Hearing Aid Purposes - Magnetic Field Strength
出版:Polish Committee for Standardization

专家解读视频
Electroacoustics - Hearing Aids - Part 4: Induction Loop Systems For Hearing Aid Purposes - Magnetic Field Strength
出版:Polish Committee for Standardization
专家解读视频