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National Fluid Power Association (NFPA)

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National Fire Protection Association (NFPA)

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National Fenestration Rating Council (NFRC)

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National Electrical Manufacturers Association (NEMA)

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National Electrical Contractors Association (NECA)

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National Code Services Association (NCSA)

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National Building Specification (NBS)

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National Board of Boiler and Pressure Vessel Inspectors (NBBI)

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National Aeronautics and Space Administration (NASA)

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Ministry of Defense UK (MOD UK)

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