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an und aus | |||
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ab und zu |
on-and off : 26 phrases in 12 subjects |
Automated equipment | 3 |
Coal | 2 |
Communications | 1 |
Earth sciences | 1 |
Finances | 1 |
Fish farming pisciculture | 1 |
General | 1 |
Gymnastics | 2 |
Metallurgy | 4 |
Microelectronics | 3 |
Optics branch of physics | 1 |
Transport | 6 |