practical duty meaning in English

实际能率
实际运行方式

First , from the viewpoint of safe operation in electrical distribution system , the importance of developing transformer terminal unit is pointed out , and the status in quo of technology , the direction of progress , the practical demand and fundamentality of transformer terminal unit in distribution automation are analyzed . the function of equipment and technical specification that meet the demand of practical duty are indicated
论文首先从配电系统安全运行的角度出发，指出了研制配变监控终端的重要意义，分析了配变监控终端的技术现状、发展趋势、现场要求及其在配电自动化中的基础地位，提出了满足实际运行要求的配变监控终端的功能、技术参数。