frequency standard
of reference
| frequency standard abbr. | |
| el. | étalon de fréquence |
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| étalon de fréquence | |||
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frequency standard : 42 phrases in 6 subjects |
| Communications | 9 |
| Cultural studies | 1 |
| Electronics | 12 |
| Information technology | 2 |
| Radio | 1 |
| Technology | 17 |