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famenvalve 发表于 2007-6-27 08:21:24

ASTM A 125-96 Standard Specification for Steel Springs, Helical, Heat-Treated

ASTM A 125-96 Standard Specification for Steel Springs, Helical, Heat-Treated

ASTM A 125-96 热处理螺旋形钢弹簧的标准规范

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