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UDC621.643.4中华人民共和国国家标准GB5630.1-85扩口式直角管接头Flaredtypetubefittings-Unionelbow-Assembly1985-11-25发布1986-09-01实施家标准局国批准
中华人民共和国国家标准UDC621.643.4扩口式直角管接头GB5630.1-85Fiaredtypetubefittings-Unionelbow-Assembly本标准适用于以油、气为介质的管路系统用扩口式直角管接头:GB5647-8SGB5630.2-85GBSG46一监B型GB5630.2-85GB5648-85国家标准局1985-11-25发布1986-09-01实施
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