single-phase three-wire distribution system
single-phase low frequency AC system 单相低频交流制 single-phase three-wire distribution system 単相三线式配电线 single-phase three-wire AC system 交流单相三线系统 ..
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single-phase three-wire distribution system
单相三线制配电系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。