碳素结构钢牌号Q235—A.F中,235是()。A.质量级别符号B.脱氧方法符号C.屈服强度数值D.疲劳强度数值

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问题 碳素结构钢牌号Q235—A.F中,235是()。 A.质量级别符号 B.脱氧方法符号 C.屈服强度数值 D.疲劳强度数值
选项
答案 C
解析

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