| 摘要 |
A digital system lock can be unlocked by only pushing several push-buttons in the specified order. This digital system lock is unlocked by the cooperation of mechanical elements, without utilizing a microcomputer device, and does not require a key. If the push-buttons are pushed in an order which does not correspond to the specific order, mechanical elements also prevent the lock from being opened until a return button is pushed and the push-buttons are pushed in the specified order.
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