<https://www.electro-tech-online.com/threads/a-riddle-about-an-electronic-door-lock.164676/>
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"2023-03-20T09:20:15+00:00"^^<http://schema.org/Date>
<https://www.electro-tech-online.com/threads/a-riddle-about-an-electronic-door-lock.164676/page-3>