| |||
| infra-red rays | |||
| infrared rays | |||
|
rayos infrarrojos : 23 phrases in 12 subjects |
| Agriculture | 2 |
| Communications | 3 |
| Earth sciences | 1 |
| Electronics | 3 |
| Fish farming pisciculture | 1 |
| General | 4 |
| Industry | 3 |
| Life sciences | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Natural sciences | 1 |
| Technology | 1 |