 |
| |||
| primary air | |||
| |||
| primary air (airflow) | |||
| 一次流: 21 phrases in 8 subjects |
| Aviation | 1 |
| Electronics | 5 |
| Hydroelectric power stations | 1 |
| Mining | 2 |
| Refrigeration | 2 |
| Securities | 1 |
| Space | 2 |
| Technology | 7 |
|
| |||
| primary air | |||
| |||
| primary air (airflow) | |||
| 一次流: 21 phrases in 8 subjects |
| Aviation | 1 |
| Electronics | 5 |
| Hydroelectric power stations | 1 |
| Mining | 2 |
| Refrigeration | 2 |
| Securities | 1 |
| Space | 2 |
| Technology | 7 |