[国外标准] ASTM A416/A416M-06
[国外标准] ASTM A416/A416M-06 预应力混凝土用无涂层七股钢铰线
[国外标准] ASTM A416/A416M-05 Standard Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Conc
[国外标准] ASTM A416/A416M-02 预应力混凝土用无涂层七股钢铰线