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| 引导控制，辅助继电器 | |||
| 辅助继电器 | |||
| 控制继电器; 领示继电器 | |||
| 引示替续器; 导频继电器; 控制主控，领示，辅助(信号)，导频信号继电器; 控制〔引示，辅助〕继电器 | |||
| pilot relay: 5 phrases in 3 subjects |
| Hydroelectric power stations | 2 |
| Space | 1 |
| Technology | 2 |
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