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

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