for资源列表
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[国外标准] EN 50052-1986 Specification for high-voltage switchgear and controlgear for industrial use. Cast alu
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[国外标准] EN 2082-3-1991 Specification for aluminium alloy forging stock and forgings. Technical specificat ..
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[国外标准] EN 2082-1-1991 Specification for aluminium alloy forging stock and forgings. Technical specificat ..
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[国外标准] EN 14141-2004 Valves for natural gas transportation in pipelines - Performance requiremEN ts and tes
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[国外标准] EN 1074-5-2001 Valves for water supply - fitness for purpose requiremEN ts and appropriate verificat
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[国外标准] EN 1074-4-2000 Valves for water supply - fitness for purpose requiremEN ts and appropriate verificat
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[国外标准] EN 1074-3-2000 Valves for water supply - fitness for purpose requiremEN ts and appropriate verificat
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[国外标准] EN 1074-1-2000 Valves for water supply - Fitness for purpose requirements and appropriate verificati
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[国外标准] EN 10080-2005 Steel for the reinforcemEN t of concrete - Weldable reinforcing steel - GEN eral