| |||
primary filter | |||
prime filter | |||
preliminary filter; roughing filter | |||
first-stage filter (I. Havkin) | |||
primary exchanger (ионитовый) |
фильтр первой ступени: 11 phrases in 5 subjects |
Construction | 2 |
Electronics | 1 |
Energy industry | 5 |
Technology | 1 |
Thermal engineering | 2 |