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| persistent waves | |||
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| sustained wave; type AO wave | |||
| continuous wave | |||
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| continuous wave transmission | |||
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ondes entretenues : 24 phrases in 7 subjects |
| Automated equipment | 2 |
| Communications | 11 |
| Earth sciences | 1 |
| Electronics | 5 |
| General | 1 |
| Marketing | 2 |
| Metallurgy | 2 |