step-down substation [电] 降压变电所 ; [电] 降压变电站

mixed traction and step-down substation 牵引降压混合变电所

Step-down substation plant 工厂降压变电所

general step down substation 总降压变电所

general step-down transformer substation 总降压变电所

step-down transformer substation 降压变电站

110kV region step-down transformer substation kV区域降压变电所