- drillability of rocks
- буримость пород
English-Russian dictionary of Oil Industry. 2014.
English-Russian dictionary of Oil Industry. 2014.
tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium