sand filter: 71 phrases in 27 subjects |
Aviation | 1 |
Cement | 1 |
Construction | 5 |
Ecology | 4 |
Electronics | 5 |
Energy industry | 3 |
Fish farming pisciculture | 1 |
General | 3 |
Geology | 2 |
Hydraulic engineering | 1 |
Karachaganak | 1 |
Makarov | 3 |
Medical | 2 |
Military | 2 |
Mining | 3 |
Natural resourses and wildlife conservation | 6 |
Oil / petroleum | 8 |
Oil and gas | 2 |
Oil and gas technology | 2 |
Rail transport | 1 |
Sakhalin | 2 |
Sakhalin R | 1 |
Seismology | 1 |
Technology | 7 |
Tengiz | 1 |
Transport | 1 |
Water supply | 2 |