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| очень глубокий вакуум | |||
| высокий вакуум (10-1 – 10-5 Па) | |||
| глубокий вакуум | |||
| высокий вакуум (1E-1 – 1E-5 Па) | |||
| hard vacuum: 5 phrases in 4 subjects |
| Makarov | 1 |
| Mass media | 1 |
| Technology | 2 |
| Welding | 1 |
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