 |
| field survey: 11 phrases in 6 subjects |
| Coal | 1 |
| Construction | 1 |
| Economy | 1 |
| General | 4 |
| Marketing | 1 |
| Natural resourses and wildlife conservation | 3 |
|
| field survey: 11 phrases in 6 subjects |
| Coal | 1 |
| Construction | 1 |
| Economy | 1 |
| General | 4 |
| Marketing | 1 |
| Natural resourses and wildlife conservation | 3 |