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采用Protel99SE绘制印刷电路板(PCB)时经常遇到的问题及相应的解决办法。特别提出了在PCB板已经基本定型后,原理图需要进一步修改而引起的PCB在线修改的方法。
Protel99SE drawing printed circuit board (PCB) often encountered problems and the corresponding solution. In particular put forward in the PCB has been the basic shape, the schematic needs to be further modified caused by the method of on-line PCB modifications.