| |||
| международная опорная система (of the International Bureau of Weights and Measures for activity measurement of γ-emitting nuclides) | |||
|
international reference system : 4 phrases in 3 subjects |
| Astrometry | 1 |
| Astronautics | 2 |
| Metrology | 1 |
| |||
| международная опорная система (of the International Bureau of Weights and Measures for activity measurement of γ-emitting nuclides) | |||
|
international reference system : 4 phrases in 3 subjects |
| Astrometry | 1 |
| Astronautics | 2 |
| Metrology | 1 |