- under-reaming of emplacement hole
- расширение боевой скважины
English-Russian small dictionary of medicine. 2015.
English-Russian small dictionary of medicine. 2015.
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