This was reported to the API by the press service of AO AMZ Ventprom.The company, with the participation of representatives of the giant of the diamond industry, conducted bench tests of the counter-rotation fan VME VV-12. t is designed for ventilation of dead-end mine workings during sinking operations in mines, and can also be used as auxiliary equipment.The purpose of the tests was to demonstrate to the representatives of ALROSA Joint Stock Company the new technical specifications of the fan obtained during the modernization of the previous model...
http://www.apiural.ru/news/economy/128270/