Демидов Виктор-Павел Сумак,вузы 2008
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![Как работает транзистор [Veritasium]](https://sun9-48.userapi.com/xvVkB33wgIzzUsW2nsE0X7Ogx9kmRR_mUgJ4ow/2mWRv1RV3Zs.jpg)
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