According to the principle, characteristics and steps of scheduled maintenance for power supply systems, a structural relation of relational database is established.
根据供电系统调度部门安排设备检修计划的制定原则、特点和步骤，建立关系数据库的组织关系。
According to the principle, characteristics and steps of scheduled maintenance for power supply systems, a structural relation of relational database is established.
根据供电系统调度部门安排设备检修计划的制定原则、特点和步骤，建立关系数据库的组织关系。
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