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| circuito de enlace | |||
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| telefonía en grupos privados; enlazamiento; concentración de enlaces | |||
| conducto de aire | |||
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Trunking : 14 phrases in 7 subjects |
| Communications | 4 |
| Electric machinery | 1 |
| Mechanic engineering | 3 |
| Microsoft | 2 |
| Power system protection | 1 |
| Telecommunications | 1 |
| United Nations | 2 |