Hydraulic Rock Drill Manufactured at Ryongsong Machine Complex

 Pyongyang, July 1 (KCNA) -- The Ryongsong Machine Complex manufactured a new-type hydraulic rock drill, according to Rodong Sinmun.
The hydraulic rock drill has great efficiency as compared with the pneumatic rock drill used in the past. It makes it possible to increase productivity as its working pressure is high and its rotary moment great.
The Ministry of Machine-building Industry is taking measures to ensure that the newly-manufactured hydraulic rock drill contributes to production in coal mines and mines. -0-