China National Standards

China Special Quarrying Industry Standards English PDF List

  •  China " Special Quarrying" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    NB/T 51059-2016 (Special Quarrying Sinking Volume for Coal Construction)
    煤炭建设特殊凿井工程消耗量定额    		 China Energy industry Standards
    Special Quarrying
    English PDF

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