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| Treibgas n; Brenngase n | |||
| Heizgas n; Brenngas n | |||
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| Brenngase n | |||
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fuel gas : 20 phrases in 10 subjects |
| Automobiles | 1 |
| Chemistry | 2 |
| Coal | 1 |
| Construction | 2 |
| Environment | 1 |
| General | 1 |
| Measuring instruments | 1 |
| Metallurgy | 5 |
| Technology | 2 |
| Transport | 4 |
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