§34a Safety technology
Security Expertise § 34a GewO, with the 9th topic: Fundamentals of Security Technology.
This is an interactive course, so first download the free file, the Workingbook.
https://34aboss.de/workingbook-3/
And here's the standard reference work for the security industry:
https://play.google.com/store/books/d...
https://34aboss.de/
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