 |
| |||
| detector tube (e.g. for measuring carbon monoxide concentration) | |||
| rectifying valve; rectifier tube | |||
| rectifier valve; rectifier tube; rectifying tube | |||
| выпрямительная лампа: 6 phrases in 4 subjects |
| Antennas and waveguides | 1 |
| General | 1 |
| Makarov | 1 |
| Technology | 3 |