Vapor is defined as diffused matter suspended in the air and impairing its transparency or as a substance in the gaseous state as opposed to the solid or liquid state; a substance such as gasoline, mercury, benzoin, or alcohol vaporized for industrial, therapeutic, or military uses; or a mixture such as the explosive mixture in internal combustion engines. For more, please see the website: https://www.paclights.com/learning-center/define-vapor-proof-light-fixtures/
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