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| плотина с вальцовыми затворами; плотина с вальцевым затвором | |||
| вальцовый затвор; плотина с вальцовым затвором | |||
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Walzenwehr : 35 phrases in 3 subjects |
| Construction | 1 |
| Hydrology | 22 |
| Water supply | 12 |
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