Displaying 1-5 of 5 result(s).
Oxygen Pressure Regulator
in NASA
Operations Planning Review
in NASA
Office of Primary Responsibility
in NASA
Orbiter/Payload Recorder
in NASA
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Similar to OPR
A - Alpha
A - Acceleration
A - Aft
A&A - Advertise and Award
A&E - Architectural and Engineering
A&E - Architects and Engineering
A&I - Assembly and Installation
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