QR коды - всё что Нужно Знать ...
Грамотный росгвардеец разъясняет про QR коды ...
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![Как устроен QR-код? [Veritasium]](https://sun9-17.userapi.com/vMRqlqbLXQugziWjeg0MGg6vB7a4YiL40h3MWw/lLA9V_KEgz0.jpg)
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