single-phase line 单相线路

single-phase line touch 单相碰线

u-shape single phase line u型单相

single-phase-line-open fault 单相断线故障

single-phase three-line ac power supply 单相三线交流供电

single-phase distribution line 単相配电线

single phase fault line detection 单相接地选线

line single-phase 线路单相

single phase grounding line selection 单相接地选线