国外标准列表
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[国外标准] BS EN 1252-1-1998 Cryogenic vessels. Materials. Toughness requirements for temperatures below -80°C
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[国外标准] BS EN 12517-1998 Non-destructive testing of welds. Radiographic testing of welded joints. Acceptance
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[国外标准] BS EN 12504-2-2001 Testing concrete in structures. Non-destructive testing. Determination of rebound