ORF has various meanings in the NASA category. Discover the full forms, definitions, and usage contexts of ORF in NASA.
A small hole or restricted opening used to control the flow of gasoline, oil, refrigerant, etc. or a fishway consisting of stepped pools connected by submerged holes. An opening of controlled size used to measure or control the flow of gases. An opening or passageway which can be have tapered edges. or An opening in a mold or finished product.
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