 |
| |||
| обратная продувка (rusil1) | |||
| взрыхление воздухом (of filter media rusil1) | |||
| air backwash: 3 phrases in 3 subjects |
| Makarov | 1 |
| Sakhalin | 1 |
| Technology | 1 |
|
| |||
| обратная продувка (rusil1) | |||
| взрыхление воздухом (of filter media rusil1) | |||
| air backwash: 3 phrases in 3 subjects |
| Makarov | 1 |
| Sakhalin | 1 |
| Technology | 1 |