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注：IGB一国家标准代号：YB一冶金行业标准代号；Y一国际先进水平标准；I一国际一般水平标准；H一国内平均先进水平标准。2基础标准和方法标准均为推荐性标准1996年冶金产品标准统计表
Note: IGB a national standard code: YB a metallurgical industry code; Y an international advanced level standards; I an international general level standards; H a domestic average advanced level standards. 2 basic standards and methods are recommended standards 1996 standard metallurgical product standards table