 |
| |||
| stuck | |||
|
被卡 : 40 phrases in 9 subjects |
| Aviation | 1 |
| Drilling | 13 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 4 |
| Oil / petroleum | 4 |
| Project management | 1 |
| Refrigeration | 1 |
| Technology | 14 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips