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答:Ⅰ级:屈服235MPa,抗拉370MPa伸长率≥25%ÎW17Àlþwrbbs.3c3t.com¨fàÐV¯
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>25:屈服335MPa,抗拉490MPa伸长率≥16%ÎW17Àlþwrbbs.3c3t.com¨fàÐV¯
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ÎW17Àlþwrbbs.3c3t.com¨fàÐV¯[此贴子已经被作者于2007-1-24 11:24:56编辑过]ÎW17Àlþwrbbs.3c3t.com¨fàÐV¯
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