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| selective time interval (Yeldar Azanbayev) | |||
| back-up-time step (для резервирования) | |||
| back-up-time step (для резервировании); grading margin time (MichaelBurov) | |||
| backup time step (для резервирования); selective interval; grading margin (Yeldar Azanbayev) | |||
| ступень селективности: 4 phrases in 3 subjects |
| Automated equipment | 1 |
| Electrical engineering | 2 |
| Energy industry | 1 |