ASTM A990 - A 990M - 23 耐腐用保压零件用特殊控制阀的铁铬镍和铬合金铸件技术规范
ASTM A990/A990M-2023 Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Parts for Corrosive Service 耐腐用保压零件用特殊控制阀的铁铬镍和铬合金铸件技术规范
2024-09-02
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