Mil-g-1149,ty 2 mil spec single material response overall
Mil-g-1149,ty 1,cl 1 mil spec 1st material response overall or astm d2000 2bg415 assn std 2nd material response overall or astm d2000 2bg415 assn std 3rd material response overall or astm d2000 2bg415 assn std 4th material response overall