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| sistema con segnali di inizio e fine carattere; telegrafia aritmica | |||
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käynnistys-pysäytysjärjestelmä : 16 phrases in 6 subjects |
| Earth sciences | 3 |
| Electric motors | 1 |
| Electronics | 4 |
| Information technology | 2 |
| Mechanic engineering | 3 |
| Microsoft | 3 |
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