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据日本《热处理》1985年№6报导,联邦德国迪高莎公司采用了一种新的QPQ盐浴软氮化工艺方法。这种方法是用无公害盐浴进行
According to Japan’s “Heat Treatment” 1985 № 6 reported that the Federal Republic of Germany Di Gesha adopted a new QPQ salt bath soft nitriding process. This method is to use pollution-free salt bath