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±ê×¼ºÅ:	ISO 9330-2-1997
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Ó¢ÎÄÌâÃû£º	Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2: Electric resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature properties
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±»´úÌæ±ê×¼ÐÅÏ¢£º	ISO 2604-3-1975 ISO/DIS 9330-2-1992
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