[国外标准] ASTM A325M-09
[国外标准] ASTM A325M-07 Standard Specification for Structural Bolts, Steel, Heat Treated, 830MPa Minimum Tensi
[国外标准] ASTM A325M-05
[国外标准] ASTM A325M-05 Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensi