sigh007 发表于 2012-3-31 17:50:00

MIL-S-24093/3


                   MIL-S-24093/3, MILITARY SPECIFICATION: STEEL FORGINGS, CARBON, AND ALLOY, HEAT-TREATED (CLASS B, ALLOY STEEL, HEXAGONAL BAR) (05 NOV 1991).         
         
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