井下供电 meaning in Chinese

dhps

A talk about the two issues in the underground power supply of sihe mine
浅述寺河矿井井下供电的两个问题
The design and implementation of a network devices monitoring system based on snmp
技术的煤矿井下供电电网实时监控系统
The paper analyzed the existing problems of common wires used as underground transmisson line of power supply and signal of monitoring and alarming , and put forward a new type of transmission wire based on plastic
摘要文章分析了井下供电电源和监控告警信号传输线路常用导线存在的问题，提出了一种基于塑料的新型传输线。