...supply;three-phase supply [gap=87]关键词:住宅;负荷计算;三相平衡;同时系数;表箱相序;需要系数法;单相供电;三相供电 ...
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three phase supply 三相供电
Three-phase power supply 三相电源 ; 三相供电
three-phase alternating-current supply 三相交流电源
Three-phase four-wire power supply 电源电压三相四线制
AC three-phase power supply 三相交流电源
three-phase emergency power supply 三相应急电源
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