China National Standards

China 2：Main GB Standards List

  •  China "2：Main" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 29723.2-2013 Grade and limit of major process energy consumption for coal mine - Part 2：Main drainage system
    煤矿主要工序能耗等级和限值 第2部分：主排水系统    		 China National Standards
    2：Main
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