對稱三相系統(tǒng) symmetrical three phase circuit: 對稱三相電路symmetrical three-phase load: 對稱三相負載symmetrical three-phase source: 對稱三相電源three phase three wire system: 三相三線制three phase three-wire system: 三相三線制下載手機詞典可隨時隨地查詞查翻譯