项目一作业（原理图+PCB+geeber）
http://http://dl.ntpcb.com/attachment/Mon_1709/178_79608_160d6ad37fe8fb2.png?19http://dl.ntpcb.com/attachment/Mon_1709/178_79608_160d6ad37fe8fb2.png?19http://dl.ntpcb.com/attachment/Mon_1709/178_79608_de2cb7c994430f7.png?14http://dl.ntpcb.com/attachment/Mon_1709/178_79608_6ae19865b0dcf5b.png?28http://dl.ntpcb.com/attachment/Mon_1709/178_79608_22718eee4c3a0be.png?25http://dl.ntpcb.com/attachment/Mon_1709/178_79608_8c6abe979b885d4.png?62
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