China National Standards

China Grade valley area GB Standards List

  •  China "Grade valley area" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 20486-2017 Grade of valley area precipitation
    江河流域面雨量等级    		 China National Standards
    Grade valley area
    English PDF
    GB/T 20486-2006 Grade of valley area rainfall
    江河流域面雨量等级    		 China National Standards
    Grade valley area
    English PDF

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