ASTM标准 A815/A815M- 18 Standard Specification for Wrought Ferritic,Ferritic/Austenitic, and MartensiticStainless Steel Piping Fittings Designation: A815/A815M- 18 Standard Specification for Wrought Ferritic,Ferritic/Austenitic, and Mar... 03月27日A815 阅读全文