 |
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| classification périodique | |||
| système périodique; classification périodique (элементов) | |||
| периодической системы: 29 phrases in 11 subjects |
| Banking | 2 |
| Chemistry | 8 |
| Finances | 2 |
| General | 1 |
| Geology | 2 |
| Information technology | 1 |
| Mathematics | 1 |
| Metallurgy | 3 |
| Physics | 1 |
| Radio | 3 |
| Technology | 5 |