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为什么从TI下载的演示demo PCB里面只有层图而没有钻孔文件呢?

这个是一个演示版

PMP8877的地址链接,下载后打开发现没有钻孔文件,谁能提供下吗?我参考下电路布局,谢谢

www.ti.com.cn/.../pmp8877