| |||
| infra-red rays | |||
| infrared rays | |||
| |||
| infrared-heater | |||
| infra-red lamp | |||
|
infrarote Strahlen : 2 phrases in 2 subjects |
| Optics branch of physics | 1 |
| Technology | 1 |
| |||
| infra-red rays | |||
| infrared rays | |||
| |||
| infrared-heater | |||
| infra-red lamp | |||
|
infrarote Strahlen : 2 phrases in 2 subjects |
| Optics branch of physics | 1 |
| Technology | 1 |