- rock drillability scale
- шкала буримости горных пород
Большой англо-русский и русско-английский словарь. 2001.
rock drillability scale
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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
