China National Standards

China Hydrogeological classification mining GB Standards List

  •  China "Hydrogeological classification mining" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 22205-2008 Hydrogeological classification of mining district or working face
    煤矿采区或工作面水文地质条件分类    		 China National Standards
    Hydrogeological classification mining
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