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| вакуумная электронная лампа | |||
| клапан разрежения (spanishru) | |||
| вакуумный клапан (кабины) | |||
| вакуумный вентиль | |||
| válvula de vacío: 9 phrases in 5 subjects |
| Antennas and waveguides | 1 |
| Electronics | 2 |
| Oil / petroleum | 3 |
| Power electronics | 1 |
| Technology | 2 |
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