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| línea terrestre | |||
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surface line : 9 phrases in 8 subjects |
| Antennas and waveguides | 1 |
| Electronics | 1 |
| General | 1 |
| Industry | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 1 |
| Scientific | 1 |
| Technology | 2 |
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