A-A-51434 1986 Edition, May 30, 1986
BLOCKER SET, X-RAY FILM IDENTIFICATION
Includes all amendments and changes through Cancellation Notice 1, September 22, 2009
Additional Comments: CNCL NO S/S
The General Services Administration has authorized the use of this commercial item description.
This commercial item description covers a set of shields of different radiopacities suitable for x-ray film identification.