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| passief systeem | |||
| passief zonnesysteem; passief zonnevangsysteem | |||
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passive system : 18 phrases in 8 subjects |
| Communications | 2 |
| Electronics | 2 |
| Energy industry | 4 |
| General | 1 |
| Information technology | 3 |
| Mechanic engineering | 1 |
| Nuclear physics | 2 |
| Transport | 3 |
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