China National Standards

China General ruler earthquake GB Standards List

  •  China "General ruler earthquake" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB 17740-2017 General ruler for earthquake magnitude
    地震震级的规定    		 China National Standards
    General ruler earthquake
    English PDF
    GB 17740-1999 General ruler for earthquake magnitude
    地震震级的规定    		 China National Standards
    General ruler earthquake
    English PDF

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