three-phase three-wire kilowatt-hour meter
... three three-phase 三相的 three-phase three-wire kilowatt-hour meter 三相三线有功电度表 AC three-phase three-wire system 交流三相三线制 ...
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three-phase three-wire kilowatt-hour meter
三相三线电度表
以上为机器翻译结果，长、整句建议使用 人工翻译 。