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UL

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 1203

Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
standard by Underwriters Laboratories, 11/22/2013

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