| |||
| silvered on the back; rear-surfaced; back-aluminized | |||
|
ruckflachenversilbert : 1 phrase in 1 subject |
| Optics branch of physics | 1 |
| |||
| silvered on the back; rear-surfaced; back-aluminized | |||
|
ruckflachenversilbert : 1 phrase in 1 subject |
| Optics branch of physics | 1 |