组成电路的基本部件是（），（）和中间环节 变频器主要由哪几个部件组成？
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5\u3001\u63a7\u5236\u7535\u8def
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开关，实现电路关和开
导线，使电路形成通路，
负载，消耗电能
秦伍蕤飞袁渠嫦滕弟簿门缯轲嬴漳局通桓阆豪茧
输入环节，输出环节。
源（电源或信号源）、负载
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