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| sistema pasivo | |||
| sistema solar pasivo | |||
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passive system : 17 phrases in 10 subjects |
| Automobiles | 1 |
| Communications | 2 |
| Energy industry | 2 |
| General | 1 |
| Information technology | 4 |
| Mechanic engineering | 1 |
| Meteorology | 2 |
| Nuclear physics | 2 |
| Transport | 1 |
| United Nations | 1 |