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| quadratic surface | |||
| quadric; quadric surface; second degree surface; surface of second order; second-degree surface; surface of the second order | |||
| поверхность второго порядка: 8 a las frases, 4 temas |
| Geometría | 1 |
| Industria energetica | 1 |
| Makárov | 1 |
| Matemáticas | 5 |