推挽式变换器推挽式变频器recursivesubranging converterr: 循环次分程转换器pushpull outputt: 推拉式输出; 推挽式输出classa pushpull sound track: 甲类推挽式声迹classb pushpull sound track: 乙类推挽式声迹complementary pushpull circuitt: 互补推挽电路下载手机词典可随时随地查词查翻译