33
/es/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
1968223
157320
2
Public Timelines
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Cabinet
For educational institutions For teachers For students Open cabinet
Crear
Create a timeline
Public timelines
Library
FAQ

17 jul 1921 año - Электрет

Descripción:

диэлектрик, помогающий в работе микрофона

Añadido al timeline:

История создания микрофона

ByЮля Мухамеджанова
23 oct 2018
0
0
364

fecha:

17 jul 1921 año
Ahora mismo
~ 103 years ago

Fotos:

About & FeedbackAcuerdoPrivacidadBibliotecaFAQ
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL