 |
| |||
| zona de comprobación | |||
| zona de control; campo de control | |||
| |||
| campo de control C | |||
| control field: 30 phrases in 9 subjects |
| Automated equipment | 6 |
| Communications | 4 |
| Electronics | 1 |
| Energy industry | 1 |
| Information technology | 1 |
| Measuring instruments | 8 |
| Natural sciences | 1 |
| Technology | 5 |
| United Nations | 3 |