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- 如果连续五次密码输入错误,则门锁被强制锁上,只能用钥匙打开。技术的关键是如何使电路更加简单,操作更加简洁,反应灵敏,尽量提高安全系数。-If you enter the wrong password five times in succession, you are forced to lock the door, only with a key to open. The key is how to make the circuits more simple to operate more co