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| 三向系; 三面体 | |||
| Russian thesaurus | |||
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| совокупность трёх взаимно перпендикулярных единичных векторов и определяемых ими плоскостей, выходящих из одной точки. Большой Энциклопедический словарь | |||
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триэдр : 5 phrases in 2 subjects |
| General | 2 |
| Mathematics | 3 |
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