 |
| |||
| air pit; pocket of air; air hole | |||
| |||
| air pit | |||
| 气坑: 24 phrases in 8 subjects |
| Automobiles | 3 |
| Ecology | 2 |
| Engineering geology | 1 |
| General | 3 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Technology | 11 |
| Textile industry | 1 |
|
| |||
| air pit; pocket of air; air hole | |||
| |||
| air pit | |||
| 气坑: 24 phrases in 8 subjects |
| Automobiles | 3 |
| Ecology | 2 |
| Engineering geology | 1 |
| General | 3 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Technology | 11 |
| Textile industry | 1 |