UL 72-2009 pdf download – Tests for Fire Resistance of Record Protection Equipment. 5.3 Humidity measuring equipment 5.3.1 For equipment to be rated Class 1 25 or 1 50, the relative humidity on the interior
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UL 72-2009 pdf download – Tests for Fire Resistance of Record Protection Equipment. 5.3 Humidity measuring equipment 5.3.1 For equipment to be rated Class 1 25 or 1 50, the relative humidity on the interior
Read more