What does o/r mean in Aircraft & Aviation?

This page is about the meanings of the acronym/abbreviation/shorthand o/r in the Miscellaneous field in general and in the Aircraft & Aviation terminology in particular.


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"o/r." Abbreviations.com. STANDS4 LLC, 2014. Web. 21 Sep. 2014. <http://www.abbreviations.com/term/544655>.

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