| |||
secondary air | |||
auxiliary air; overgrate air | |||
overfire air | |||
| |||
secondary air | |||
| |||
over fire air | |||
| |||
secondary air |
二次 风 : 28 phrases in 9 subjects |
Economy | 1 |
Electronics | 2 |
General | 2 |
Metallurgy | 7 |
Nautical | 1 |
Refrigeration | 1 |
Space | 1 |
Technology | 12 |
Wind Energy | 1 |