zhangyongwen 发表于 2008-5-23 14:55:21

BS EN10083-2-1991 Quenched and tempered Part 2. Technical delivery conditions fo

Quenched and tempered steels Part 2. Technical delivery conditions for unalloyed quality steels

[ 本帖最后由 tdragonfu 于 2008-6-18 17:51 编辑 ]
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