| |||
| optical flat; glass flat; piano-disk; plane glass plate; flat piece of glass; flat lens | |||
| optic flat; optical flat; plane-parallel glass | |||
|
Planglas : 3 phrases in 1 subject |
| Optics branch of physics | 3 |
| |||
| optical flat; glass flat; piano-disk; plane glass plate; flat piece of glass; flat lens | |||
| optic flat; optical flat; plane-parallel glass | |||
|
Planglas : 3 phrases in 1 subject |
| Optics branch of physics | 3 |