 |
| English | Russian |
| international radium standard | международный радиевый стандарт |
| international reference system | международная опорная система (of the International Bureau of Weights and Measures for activity measurement of γ-emitting nuclides) |
|
| English | Russian |
| international radium standard | международный радиевый стандарт |
| international reference system | международная опорная система (of the International Bureau of Weights and Measures for activity measurement of γ-emitting nuclides) |