workfield
| workfield | |
| opt. | Arbeitsfeld |
| |||
| Arbeitsfeld n | |||
|
workfield : 2 phrases in 1 subject |
| Optics branch of physics | 2 |
| workfield | |
| opt. | Arbeitsfeld |
| |||
| Arbeitsfeld n | |||
|
workfield : 2 phrases in 1 subject |
| Optics branch of physics | 2 |