原帖由
jk090909于 2008-3-22 16:24 发表
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产品是否是用板材
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NF A 35-5005 ]6 Z' O1 h& U- A* a, m8 @2 w Steel types E24, E28, E36 for use in metallic construction
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DIN EN 10296-14 Y6 u# A; W0 n4 \9 S0 V& o& \ Welded circular steel tubes for general and mechanical purposes
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