Изготовление воздушных фильтров
Сюжет из передачи канала Discovery “How it’s made?“
Описан процесс изготовления воздушных фильтров
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![«Великая победа под Ленинградом» [1944 г.]](https://sun9-75.userapi.com/iFqP2RgXElR8DV0XX8oz1us90EtcV2ltzVoMZw/fq637PZjhoc.jpg)
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