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| Dreierring m (образованное тремя [SiO4]- тетраэдрами); Dreiring m (образованное тремя [SiO4]- тетраэдрами) | |||
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тройное кольцо : 3 phrases in 2 subjects |
| Geology | 2 |
| Polymers | 1 |
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