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| ultrasonic frequency (10 в 4-й степени – 10 в 10-й степени Гц, прикладываемая, напр., к трубе или инструменту в процессах производства труб) | |||
| ультразвуковая частота колебаний: 6 phrases in 4 subjects |
| General | 1 |
| Mass media | 1 |
| Pipelines | 3 |
| Quality control and standards | 1 |
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