secondary air | |
met. | aria secondari a |
transp. construct. | aria secondaria |
injection system | |
chem. | sistema di iniezione |
| |||
aria secondari a | |||
aria secondaria | |||
area secondaria |
secondary air: 4 phrases in 3 subjects |
Coal | 1 |
Environment | 1 |
Mechanic engineering | 2 |