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| Dreistufen... f; dreistufig; Dreistufen- f | |||
| dreistufig (filter) | |||
| "Dreier" m; Dreischritt m | |||
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three -step : 6 phrases in 6 subjects |
| Astronomy | 1 |
| Communications | 1 |
| Computer numerical control | 1 |
| Gymnastics | 1 |
| Information technology | 1 |
| Measuring instruments | 1 |
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