 |
| |||
| Abgas n (released through the stack); Kaminabgas n (released through the stack); Schomsteinabgas n (released through the stack); Fortgas n (released through the stack) | |||
| vent gas: 4 phrases in 3 subjects |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Transport | 1 |
|
| |||
| Abgas n (released through the stack); Kaminabgas n (released through the stack); Schomsteinabgas n (released through the stack); Fortgas n (released through the stack) | |||
| vent gas: 4 phrases in 3 subjects |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Transport | 1 |