 |
| |||
| standard flow | |||
| 标准 流量: 11 phrases in 6 subjects |
| Aviation | 4 |
| Compressors | 2 |
| Earth sciences | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |
|
| |||
| standard flow | |||
| 标准 流量: 11 phrases in 6 subjects |
| Aviation | 4 |
| Compressors | 2 |
| Earth sciences | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |