Pyongyang, May 30 (KCNA) — Universities in the DPRK have made a number of achievements conducive to modernizing coal mines and increasing coal production.
Scientists at Kim Il Sung University developed new mine fumes neutralizer helpful to labor protection and faster tunneling.
Teachers and researchers at Phyongsong University of Coal Mining improved a hewing method for increased production of soft and hard coals.
They also made a new type of battery tramcar, electro-muck loader and anchor-bolt wagon drill and doubled the capacity of air separator.
Among achievements they made are a tramcar motor speed regulator and a digital audio communication device.
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