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| radio wave; hertzian wave | |||
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onde radio : 16 phrases in 9 subjects |
| Coal | 1 |
| Communications | 4 |
| Construction | 1 |
| Earth sciences | 1 |
| General | 1 |
| Industry | 1 |
| Marketing | 2 |
| Natural resourses and wildlife conservation | 3 |
| Telecommunications | 2 |
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