ISO/DIS 5149-2

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ISO/DIS 5149-2 refers to a Draft International Standard from the International Organization for Standardization (ISO) regarding refrigerating systems and heat pumps. Specifically, it focuses on Part 2: Design, construction, testing, marking, and documentation within the broader ISO 5149 standard series. This means it's a draft version of an international standard that is still under development and open for public review.