 |
| |||
| reference | |||
| 读数起点: 9 phrases in 8 subjects |
| Aviation | 1 |
| Compressors | 1 |
| Construction | 1 |
| Drilling | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Technology | 1 |
|
| |||
| reference | |||
| 读数起点: 9 phrases in 8 subjects |
| Aviation | 1 |
| Compressors | 1 |
| Construction | 1 |
| Drilling | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Technology | 1 |