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GB/T1220
GB/T1220
GB/T1220 standard specifies the order, classification, code, size, shape, weight and tolerances of stainless steel, technical requirements, test methods, inspection rules, packaging, marking and quality certificates.GB/T1220 standard main steel grade:0Cr18Ni9Ti,00Crl7Nil4Mo2 shipbuilding steel pipe and so on.

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