Powering a circuit , however, required a much higher voltage.

但是供电电路需要更高的电压.

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OPEN 12 - VOLT SUPPLY CIRCUIT BETWEEN FUSE AND TCM.

修理熔丝和tcm间12 - 供电电路的断路.

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Well - designed: advanced switching power supply, internal 48 V power supply switches, circuIt'small size and high efficiency.

设计合理: 采用先进的开关电源技术, 交换机内部48V供电, 电路体积小,效率高.

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A set of ac power - supply circuits ( usually three ) carrying currents of equal frequency with uniformly - spaced phase differences.

一组频率相同,相位彼此相差均匀的交流供电电路 ( 一般是三相 ).

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