lybro 发表于 2009-7-13 08:34:45

ASTM A 2-2002

ASTM A 2-2002
Standard Specification for Carbon Steel Girder Rails of Plain, Grooved, and Guard Types
普通型,带槽和防护型碳素工字钢轨
页: [1]
查看完整版本: ASTM A 2-2002