China National Standards

China pearl grading GB Standards List

  •  China "pearl grading " GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 18781-2023 pearl grading {译}
    珍珠分级    		 China National Standards
    pearl grading
    English PDF
    GB/T 18781-2008 Cultured pearl grading
    珍珠分级    		 China National Standards
    pearl grading
    English PDF

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