система канализации : 47 phrases in 12 subjects |
Building structures | 2 |
Chemistry | 1 |
Construction | 17 |
General | 2 |
Hydrography | 2 |
Hydrology | 5 |
Hygiene | 1 |
Public utilities | 1 |
Sewage and wastewater treatment | 5 |
Technology | 5 |
Thermal engineering | 1 |
Water supply | 5 |