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| forme triangulaire (Sergei Aprelikov) | |||
| contour en pyramide (лица в фас vleonilh) | |||
| треугольная форма: 9 phrases in 8 subjects |
| Agriculture | 1 |
| Automated equipment | 2 |
| Aviation | 1 |
| Electrical engineering | 1 |
| Food industry | 1 |
| Medical appliances | 1 |
| Radio | 1 |
| Радиоактивное излучение | 1 |