闪光灯触发信号线：Flashlight trigger signal line 电源信号线：power supply signal line 车检器触发信号线：vechile sensitive unit trigger signal line ..
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Signal power supply line 信号电源线
About 70 percent of facilities, including power supply, monitoring, communication and signal, have been installed along the line and the rest will be finished by the end of this year, the report said.
据北京晚报的报道称，该线路上包括供电、监控和信号系统设施中的70%已经安装完毕，其余部分将在今年年底完成。
In this system, there is no signal line connection, only the power supply to the motherboard power connector.
在这个系统中，没有任何信号线的连接，只有电源到主板的电源连接。
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