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☆ 喜多多 回复:
Above sample's composite is 3Cr13 steel, which conform to GB/T1220-1992
上述样品的组分是3CR13钢。符合 GB/T1220-1992
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☆ 静思夜 回复:
By GB/T1220-1992 standards, in line with the composition just 3Cr13