China National Standards

China Specification overburden drilling Industry Standards English PDF List

  •  China "Specification overburden drilling" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    NB/T 35066-2015 Specification of overburden drilling techniques for hydropower projects
    水电工程覆盖层钻探技术规程    		 China Energy industry Standards
    Specification overburden drilling
    English PDF

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