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renewal rate | |||
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repair frequency (ssn) |
частота восстановлений : 21 phrases in 12 subjects |
Antennas and waveguides | 1 |
Cardiology | 1 |
Communications | 1 |
Electronics | 1 |
Energy system | 1 |
Information technology | 1 |
Mass media | 4 |
Medical | 1 |
Metrology | 1 |
Occupational health & safety | 2 |
Technology | 3 |
Telecommunications | 4 |