What does UDF mean in Governmental & Military

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All UDF meanings

What does UDF stand for?

UDF stands for "Un- Ducted Fan aircraft engine"

How to abbreviate "Un- Ducted Fan aircraft engine"?

"Un- Ducted Fan aircraft engine" can be abbreviated as UDF

What is the meaning of UDF abbreviation?

The meaning of UDF abbreviation is "Un- Ducted Fan aircraft engine"

What does UDF mean?

UDF as abbreviation means "Un- Ducted Fan aircraft engine"