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A-A-50211 Revision A, February 5, 1988
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RODS, STADIA (FOLDING)
Includes all amendments and changes through Validation Notice 2, September 1, 2006
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The General Services Administration has authorized the use of this commercial item description in preference to Federal Specification GG-R-550.

This description covers two types of folding stadia rods:

Type I - decimal - English graduations, and Type II metric graduations.