 |
| |||
| underground operations | |||
| underground work | |||
| travaux souterrains: 7 phrases in 3 subjects |
| Construction | 2 |
| General | 4 |
| Social science | 1 |
|
| |||
| underground operations | |||
| underground work | |||
| travaux souterrains: 7 phrases in 3 subjects |
| Construction | 2 |
| General | 4 |
| Social science | 1 |