| |||
sulphide zone | |||
primary zone |
первичная зона : 39 phrases in 13 subjects |
Analytical chemistry | 6 |
Astronautics | 1 |
Aviation medicine | 1 |
Biology | 1 |
Energy industry | 8 |
Mass media | 6 |
Medical | 2 |
Metallurgy | 1 |
Oil / petroleum | 2 |
Oilfields | 1 |
Sociology | 2 |
Technology | 2 |
Weapons of mass destruction | 6 |