What alloying element and how much of it (weight percent) is necessary to make a stainless...

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【简答题】

What alloying element and how much of it (weight percent) is necessary to make a stainless steel “stainless”? What types of surface film protects stainless steel? What are the four basic types of stainless steels?

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N~乙酰葡萄糖胺

脂多糖

粘肽(肽聚糖)

磷壁酸

脂质双层

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