| |||
| 可变空气体积 | |||
| 变风量 | |||
|
variable-air-volume : 11 phrases in 3 subjects |
| Hydroelectric power stations | 2 |
| Refrigeration | 4 |
| Technology | 5 |
| |||
| 可变空气体积 | |||
| 变风量 | |||
|
variable-air-volume : 11 phrases in 3 subjects |
| Hydroelectric power stations | 2 |
| Refrigeration | 4 |
| Technology | 5 |