One of the transformer windings is connected to a source of ac electric power , and the second transformer winging supplies electric power to loads .
变压器的绕组之一，是连接到交流电源，第二个是给用电器提供电源。
One of the transformer windings is connected to a source of ac electric power , and the second transformer winging supplies electric power to loads .
变压器的绕组之一，是连接到交流电源，第二个是给用电器提供电源。
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