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| Reserveanlage f | |||
| Ausweichsystem n; Bereitschaftssystem n; Duplexsystem n; Ersatzsystem n; Reservesystem n | |||
| Aushilfssystem n | |||
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| Ersatzsystem n | |||
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back-up system : 6 phrases in 4 subjects |
| Communications | 1 |
| Electronics | 2 |
| Information technology | 2 |
| Microelectronics | 1 |