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SAE ARP 147E-2001 (SAE ARP147E-2001)
Environmental Control Systems Terminology ( Reaffirmed: Dec 2007 )
This SAE Aerospace Recommended Practice (ARP) provides the definition of terms commonly used in aircraft environmental control system (ECS) design and analysis. Many of ther terms may be used as guidelines for establishing standard ECS nomenclature. Some general thermodynamic terms are included that are frequently used in ECS analysis, but this document is not meant to be an inclusive list of such terms.
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Society of Automotive Engineers [sae]