China National Standards

China jadeite（colorless）grading GB Standards List

  •  China "jadeite（colorless）grading" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 29155-2012 Transparent jadeite（colorless）grading
    透明翡翠(无色)分级    		 China National Standards
    jadeite（colorless）grading
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