MRC:
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.MDCL
Material Specification:
Mil-s-13048, fs1018-cancelled military specification single material response and mil-s-13048, fs1020-cancelled federal standard single material response and mil-s-13048, fs1022-cancelled military specification single material response and mil-s-13048, fs1025-cancelled military specification single material response and mil-s-13048, fs1030-cancelled military specification single material response