 |
| |||
| datum-level; datum level | |||
| datum line; datum plane | |||
| arbitrary level; plane of reference | |||
| reference level | |||
| reference line | |||
| условный уровень: 26 phrases in 15 subjects |
| Aviation | 1 |
| Business | 2 |
| Cartography | 6 |
| Construction | 1 |
| Geology | 3 |
| Makarov | 1 |
| Mass media | 1 |
| Meteorology | 1 |
| Military | 1 |
| Mining | 3 |
| Oceanography & oceanology | 1 |
| Petrography | 1 |
| Rail transport | 1 |
| Road works | 1 |
| Technology | 2 |