Ex c,b,k = Ex h (non-electrical explosion protection)

According to ISO 80079-37:2016 there is only one marking possible: Ex h for Ex non electrical devices.
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can a lorry be considered as a possible ignition source in a

Instandhaltung Es ist auf eine regelmässige Instandhaltung ■ Inspektion (Messen, Prüfen, Erfassen),

What you do when you experience failures / non compliance /… related

IEC 60079-1:2014 Edition 7.0, Explosive atmospheres – Part 1: Equipment protection by