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| class 4/5 system; combined exchange; combined local/toll system; combined local/transit exchange; combined system | |||
| sistema combinado: 12 phrases in 7 subjects |
| Agriculture | 1 |
| Earth sciences | 1 |
| Electronics | 2 |
| Industry | 1 |
| Information technology | 1 |
| Technology | 1 |
| Transport | 5 |