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4月21-25日开启“全国优秀奖评审会暨线上路演会”。
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节设定pwm的占空比。 (2)为了使电源上电瞬间电压不会突然增加到设定值，引起瞬间冲击电流过大损坏冷光片，程序在初始状态设定缓启动程序能够使电源开机后，电压从0缓慢上升到设定电压
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