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| primary sludge | |||
| primary sludge (Термин в частности использован в статье "Pre-treatment of wastewater sludge before anaerobic digestion – hygienisation, ultrasonic treatment and enzyme dosing" by Asa Davidsson and Jes La Cour Jansen Agent_wind) | |||
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| greenfield settlement (MichaelBurov) | |||
| первичный осадок: 6 phrases in 5 subjects |
| Construction | 2 |
| Ecology | 1 |
| Hydraulic engineering | 1 |
| Makarov | 1 |
| Oil / petroleum | 1 |