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PCB中的阻焊和阻焊层是什么?如何区分?

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PCB中的阻焊和阻焊层是什么?如何区分? JPEG Origin Image Download
大家在绘制PCB的时候会发现我们的EDA软件当中都存在阻焊层和钢网层这两个层,那么大家有想过这两个层是有什么作用呢?