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Rohrleitung : 40 phrases in 11 subjects |
| Agriculture | 9 |
| Coal | 2 |
| Communications | 1 |
| Electronics | 9 |
| Energy industry | 2 |
| Environment | 1 |
| General | 5 |
| Mechanic engineering | 5 |
| Metallurgy | 4 |
| Patents | 1 |
| Transport | 1 |
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