Password lock is not a frequent operation use the product, it can be said is a semi-static products, using mechanical means to be more practical number. However, due to large electronic password lock, caused to people subjectively feel more secure. From the last century, 80 years later, the development of new locks are mostly concentrated in the intelligent electronic password lock

矩阵式键盘实现的电子密码锁C程序.doc

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