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| indirektes Heizungssystem | |||
| geschlossener Kreislauf | |||
| indirektes System | |||
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indirect system : 24 phrases in 11 subjects |
| Automated equipment | 2 |
| Communications | 1 |
| Earth sciences | 1 |
| Economics | 1 |
| Electronics | 3 |
| Finances | 2 |
| General | 2 |
| Law | 1 |
| Refrigeration | 1 |
| Taxes | 7 |
| Technology | 3 |