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GB 4789.31-2013 national food safety standard food microbiological examination enterobacteriaceae phage diagnostic examination of salmonella, shigella and diarrhoeal escherichia coli

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GB 4789.2-2022 national food safety standard for microbiological examination of food - determination of total colony count

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GB 4789.28-2013 national food safety standard - quality requirements for microbiological testing media and reagents in food

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GB 4789.2-2022 national food safety standard for microbiological examination of food - determination of total colony count

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