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Standard [CURRENT]

NF Z89-381:1997-12-01

NF ETS 300381:1997-12-01

Telephony for hearing impaired people. Inductive coupling of telephone earphones to hearing aids

German title
TELEFONIE FUER HOEBEEINTRAECHTIGTE MENSCHEN. INDUKTIVE KOPPLUNG VON TELEFON-HOERKAPSELN AN HOERHILFEN
Publication date
1997-12-01
Original language
French
Pages
19

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Publication date
1997-12-01
Original language
French
Pages
19

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