| |||
basal level; main level; sill floor; sill level; main floor; sollar level; reference plane | |||
floor level; sill; winding level | |||
master horizon | |||
sole |
основной горизонт: 27 phrases in 10 subjects |
Construction | 1 |
Geology | 8 |
Gold mining | 1 |
Makarov | 3 |
Mining | 7 |
Oceanography & oceanology | 1 |
Oil / petroleum | 2 |
Oil and gas | 1 |
Oilfields | 1 |
Technology | 2 |