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17 lugl 1921 anni - Электрет

Descrizione:

диэлектрик, помогающий в работе микрофона

Aggiunto al nastro di tempo:

История создания микрофона

ByЮля Мухамеджанова

23 ott 2018

0

0

409

Data:

17 lugl 1921 anni

Adesso

~ 104 years ago

Immagini:

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