famenvalve 发表于 2007-6-27 08:03:59

ASTM A 729-93 Standard Specification for Alloy Steel Axles, Heat-Treated, for Ma

ASTM A 729-93 Standard Specification for Alloy Steel Axles, Heat-Treated, for Mass Transit and Electric Railway Service
ASTM A 729-93 货物运输及电气铁路用热处理合金钢轴的标准规范
页: [1]
查看完整版本: ASTM A 729-93 Standard Specification for Alloy Steel Axles, Heat-Treated, for Ma