二级站 meaning in English

secondary station

It sets up an automatic reading meter system for daqing oil fields by the structural and distributing energy characteristics of daqing electric power system . meanwhile , it principally studies the structural projects of the dispatching main station of electric system and the secondary station of 8th oil factory
根据大庆电力系统机构与能量分布特点，建立了大庆油田电力自动抄表系统，重点研究了电力调度中心主站和采油八厂二级站的构成方案，保证系统具有实时性、准确性、科学性、灵活性和先进性。
In first level , the central server can collects data from substation and control all the relevant computers and instruments . the substation computers is the second level , they can communicate with central server through pstn ( public switched telephone network ) , they also collect data from instruments of its own and control them
第一级为调度级，中心站服务器负责汇总和处理所有数据，控制所有站级工控机和现地级仪器；第二级站级工控机，通过公共电信网与中心站进行通信，响应中心站服务器，从各仪器采集数据、控制本站仪器。