rétrodiffusion : 81 phrases in 15 subjects |
Analytical chemistry | 1 |
Astronautics | 1 |
Chemistry | 2 |
Computers | 1 |
Measuring instruments | 2 |
Medical appliances | 6 |
Natural resourses and wildlife conservation | 1 |
Physics | 3 |
Radio | 3 |
Surveying | 1 |
Technology | 2 |
Textile industry | 1 |
Дозиметрия | 1 |
Радиоактивное излучение | 48 |
Радиография | 8 |