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  • ASTM E2849-2018 Standard Practice for Professional Certification Performance Testing2023-07-07
  • DB11/T 100-2009 美发服务质量要求 The quality requirements of hairdressing service2023-07-07
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  • DIN EN ISO 10272-2-2017 Microbiology of the food chain - Horizontal method for the detection and enumeratio...2023-07-07