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protel绘图时找不到要用的芯片怎么办?
2007-5-20 21:00
- EDA 技术
- 6
- 3790
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怎么在无原理图的基础上制作PCB板,我看书多时了,请各位指教
2007-5-29 14:46
- PCB技术
- 21
- 4968
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谁有设计规范,参考一下给公司弄个!
2008-6-4 12:00
- 电子技术交流论坛
- 6
- 2455
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请教,在protel中如何画这种焊盘呢?(有图)
2007-3-13 19:40
- PCB技术
- 6
- 3866
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
菜鸟画的垃圾板
2007-4-11 13:30
- PCB技术
- 36
- 6248
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
dwg格式的文件怎么用Protel99se打不开
2013-9-17 15:32
- 电子技术交流论坛
- 23
- 8738
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