China National Standards

China backflling Industry Standards English PDF List

  •  China "backflling" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    NB/T 51020-2014 Specification of powered support used in coal mining by solid backflling
    煤矿用固体充填液压支架技术条件    		 China Energy industry Standards
    backflling
    English PDF

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