| |||
| double face | |||
|
single wall : 17 phrases in 6 subjects |
| Coal | 1 |
| Construction | 5 |
| General | 1 |
| Materials science | 3 |
| Packaging | 3 |
| Technology | 4 |
| |||
| double face | |||
|
single wall : 17 phrases in 6 subjects |
| Coal | 1 |
| Construction | 5 |
| General | 1 |
| Materials science | 3 |
| Packaging | 3 |
| Technology | 4 |