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| arc process (связывания азота) | |||
| дуговой процесс: 25 phrases in 7 subjects |
| Combustion gas turbines | 1 |
| Electrical engineering | 1 |
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| Makarov | 2 |
| Metallurgy | 11 |
| Technology | 7 |
| Welding | 2 |
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