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发表于 2009-9-10 19:38:30
ASTM A 990-2005 耐腐用保压零件用特殊控制阀的铁铬镍和铬合...
A990-03 Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Parts for Corrosive Service