排水沟: 127 phrases in 15 subjects |
Agrochemistry | 2 |
Automobiles | 1 |
Construction | 6 |
Electronics | 9 |
General | 41 |
Geology | 1 |
Military | 1 |
Mining | 1 |
Nautical | 4 |
Oil processing plants | 5 |
Rail transport | 1 |
Road works | 4 |
Technology | 48 |
Water resources | 2 |
Water supply | 1 |