duty pump;service pump是什么意思

用法例句

The unattended transformer substation supervisory system is mainly used in the electric power enterprise control center to carry through the real-time surveillance, the remote control and the record to the many subordinate transformer substations working condition.

无人值勤变电站监控系统用于电力企业总控中心对下属多个变电站的运行状况进行实时监视、遥控和记录。