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10000 b timing (with seconds and minutes) circuit
Source: InternetPublisher:李商隐身 Updated: 2011/12/15
![10000 b计时(带秒、分)电路](http://www.eeworld.com.cn/circuit/upload/538a1bc8a409ff500dc8e0cb6c6d7ecb/b34de4e2-3c63-11ec-9d64-086126841eb8.gif)
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