求翻译：毒理研究：辐照鼠用灭菌饲料，消毒情况：60CO照射消毒，符合GB14924.2-2001，营养成份：符合GB14924.3-2001，生产单位：苏州双狮实验动物饲料科技有限公司，许可证号：苏E饲生字（2002）-006，给料方法：将饲料放入金属笼盖上给料专用位置，自由摄食。是什么意思？

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Toxicology Research: irradiated rat used in 4.1.8.4 : 60 feed, disinfection, and consistent with GB CO disinfectant exposure 924.2 -2001, nutritional ingredients: meet GB 924.3 -2001, units of production: Suzhou double lion experimental animal feed science and technology co. , ltd. , License No. : S

Toxicology research: The exposure mouse uses the antiseptic feed, the disinfection situation: The 60CO illumination disinfection, conforms to GB14924.2-2001, the nutrition ingredient: Conforms to GB14924.3-2001, the production unit: Suzhou Double Lion brand experimental animal feed science and techn

Toxicology: sterilization of feed irradiation rats, disinfection: 60CO irradiation sterilization, in line with GB14924.2-2001, the nutrients: meet the GB14924.3-2001, the production unit: Suzhou double Lion animal feed science and technology limited company, permit number: Su workbook e-fed (2002)-0

Toxicology: sterilization of feed irradiation rats, disinfection: 60CO irradiation sterilization, in line with GB14924.2-2001, the nutrients: meet the GB14924.3-2001, the production unit: Suzhou double Lion animal feed science and technology limited company, permit number: Su workbook e-fed (2002)-0