- 69, permissive control device
- 许可控制元件。通常是具有两个位置，在其中一个位置时，允许断路器合闸或设备投入运行，而在另一位置时防止断路器或设备被操作。
English-Chinese electricity dictionary (电气专业词典). 2013.
69, permissive control device
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