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| 输入电路 | |||
| 输人电路 | |||
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| 输入电路 用于基础继电器 | |||
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input circuit : 35 phrases in 11 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Communications | 2 |
| Electronics | 13 |
| Information technology | 1 |
| Metallurgy | 1 |
| Power system protection | 2 |
| Shipbuilding | 3 |
| Space | 1 |
| Technology | 8 |
| Telecommunications | 2 |