famenvalve 发表于 2007-6-27 08:15:36

ASTM A 49-01 Standard Specification for Heat-Treated Carbon Steel Joint Bars,

ASTM A 49-2001 Standard Specification for Heat-Treated Carbon Steel Joint Bars, Microalloyed Joint Bars, and Forged Carbon Steel Compromise Joint Bars

ASTM A 49-2001 热处理碳素钢连接棒材、微合金连接棒材和法兰连接棒材的标准规范

[ 本帖最后由 tdragonfu 于 2008-4-20 22:52 编辑 ]
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