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| нулевая группа | |||
| благородные газы; редкие газы; инертные газы | |||
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| инертный газ | |||
| редкий газ | |||
| благородный газ | |||
| gaz rares: 5 phrases in 3 subjects |
| Geology | 1 |
| Nuclear physics | 3 |
| Radio | 1 |
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