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Description: H-cylinder canisters containing argon gas for use in extinguishing fire in a server room, without damaging equipment. The bright green shoulder of the H cylinders signals an inert gas. Red is used here for argon, but other colors are used for argon in various systems, which are not fully standardized across the world.
Title: Argon
Credit: My Opera devblog
Author: William Viker
Permission: Copyrighted image that an be used as long and attribution is provided
License: Attribution

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