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很实用的单端反激式开关电源的变压器设计，有实例讲解，通俗易懂，详细全面，是开关电源设计的必备

The AT89LS52 is a low-voltage, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufac

一个企业家心灵深处渴望优秀人才的卓越追求和深层次的叹息、痛苦和感受