NF M01-013-7*NF ISO 13909-7:2005 Hard coal and coke - Mechanical sampling - Part 7 : methods for determining the precision of sampling, sample preparation and testing
2005NF M01-013-7*NF ISO 13909-7:2005 Hard coal and coke - Mechanical sampling - Part 7 : methods for determining the precision of sampling, sample preparation and testing