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| 双位控制 | |||
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off- on control : 42 phrases in 12 subjects |
| Architecture | 1 |
| Automobiles | 5 |
| Aviation | 1 |
| Compressors | 2 |
| Electronics | 4 |
| Information technology | 1 |
| Mathematics | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 1 |
| Power system protection | 1 |
| Space | 5 |
| Technology | 16 |
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