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| зона первичного горения | |||
| первичная зона (месторождения); зона первичных сульфидных руд | |||
| первичная зона | |||
| zone primaire: 10 phrases in 5 subjects |
| Analytical chemistry | 3 |
| Aviation | 2 |
| Chemistry | 1 |
| Geology | 2 |
| Technology | 2 |
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