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| central de conmutación electrónica; central electrónica | |||
| sistema conmutación electrónica | |||
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electronic exchange : 21 phrases in 8 subjects |
| Communications | 5 |
| Education | 1 |
| Electronics | 7 |
| Finances | 1 |
| Information technology | 1 |
| Librarianship | 4 |
| Name of organization | 1 |
| Statistics | 1 |
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