backwashing : 15 phrases in 11 subjects |
Construction | 2 |
Ecology | 1 |
Electronics | 1 |
Galvanizing | 1 |
Makarov | 2 |
Natural resourses and wildlife conservation | 1 |
Sakhalin | 1 |
Technology | 1 |
Textile industry | 2 |
Water resources | 2 |
Weapons of mass destruction | 1 |