Подземная разработка месторождений полезных ископаемых
Подземная разработка месторождений полезных ископаемых. ФП “Профессионалитет“. Киселевский горный техникум.
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![КОНТАКТ [SFM]](https://sun9-2.userapi.com/egRvt6RvBsTEbvJBCsevgiBgtDbujdWHuKDIFg/NXClCsSUa-I.jpg)
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