PFRX means Preflight Relmat X-1,2,3...9 or A,B,C...Z in NASA




Similar to PFRX

AAR - After Action Review
AARL - Aeronautical and Astronautical Research Laboratory
AAV - Air Admittance Valve
AAV - Aerospace Audio- Visual
ABA - Astronaut Boarding Aircraft
ABC - Active Body Control
ABC - Audio Bus Coupler

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