| reference frequency abbr. | |
| commun. el. | referensfrekvens |
|
stabilised : 49 phrases in 10 subjects |
| Chemistry | 4 |
| Communications | 2 |
| Earth sciences | 1 |
| Electronics | 28 |
| Environment | 1 |
| Mechanic engineering | 4 |
| Metallurgy | 1 |
| Technology | 3 |
| Transport | 4 |
| Waste management | 1 |