sundefu 发表于 2023-9-3 09:13:56

ASTM A213／A213M

ASTM A213/A213M-22 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
锅炉、过热器和换热器用无缝铁素体和奥氏体合金钢管子
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