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如何自制腐蚀性单面板?
2010-7-11 14:07
- PCB技术
- 3
- 1704
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我需要学 标准C吗?
2014-9-20 20:19
- 新手园地
- 32
- 4400
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中学问题:请问这个二极管的作用
2007-11-11 11:28
- 新手园地
- 25
- 3727
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
PROTEL99SE里面怎么从PCB生成网络表?
2013-11-19 18:31
- 电子技术交流论坛
- 23
- 15667
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
Protues共阳七段数码管引脚排列问题
2007-7-24 13:21
- 侃单片机论坛
- 5
- 7300
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
关于太阳能冲电问题
2007-7-8 22:34
- 电子技术交流论坛
- 17
- 2985
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你能看出破绽?
2007-7-14 09:08
- 电子技术交流论坛
- 27
- 4253
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25个电磁阀用什么控制比较方便?
2007-9-6 11:11
- 工控、机电一体化
- 24
- 4302
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
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一个PROTEL99中的问题?
2007-7-3 15:47
- PCB技术
- 6
- 1696
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请教AT89C51SND1C的BOOTLOADER
2007-7-3 09:01
- 侃单片机论坛
- 7
- 2251
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请问如何用普通I/O输出音乐
2007-7-1 18:24
- 侃单片机论坛
- 15
- 2173
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
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![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请教一个关于电脑运行慢的问题
2007-7-12 23:52
- 电子技术交流论坛
- 15
- 2223
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阻容降压电路
2013-4-2 15:04
- 新手园地
- 16
- 8989
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
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