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PDF Standards UL 60079-29-4

Explosive Atmospheres – Part 29-4: Gas Detectors – Performance Requirements of Open Path Detectors for Flammable Gases
standard by Underwriters Laboratories, 08/24/2018

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UL

PDF Standards UL 121203

Standard for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Class I, Zone 2 and Class III, Division 2 and 2 Hazardous (Classified) Locations
standard by Underwriters Laboratories,

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