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KR940005187A
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電気信号を音響信号に変換する装置
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コンデンサーマイクロホン
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Musical instrument performance amplifier
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Audio amplifier with timing circuit to power down bias control and amplifying circuits in sequence
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Push-pull amplifiers
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Circuit régulateur
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Amplificateur thermo-ionique pour dispositifs photo-électriques.
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Pastille microphonique à transducteur piézo-résistif
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BE378051A
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Способ преобразовани широкополосного электрического сигнала в акустический
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Feedback amplifier with reduced distortion
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포켓형 보청기 회로
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오피 앰프를 이용한 저음보강 회로
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BE654255A
(cs)
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ミュート回路およびそれを用いたオーディオ処理回路
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Hitchcock
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SUPER-FIDELITY AUDIO AMPLIFIER |
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音響再生装置
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BE358912A
(cs)
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KR970068733A
(ko)
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다 기능을 구비한 보청기
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