Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 55D is...

55D is

  • Grayling Army Air Forces Airport, Grayling, Michigan USA

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Acronym Definition Searched: WAHS ETA CHIU OFLF OMH 62903 62642 RIF Rx MAGN SI VDP NYPL 19343 ARR