中华人民共和国国家标准 GB/T 21931.1-2008/ISO 7524:1985 镍、镍铁和镍合金 碳含量的测定高频燃烧红外吸收法=NICKEL

FERRONICKEL AND NICKEL ALLOYS-DETERMINATION OF CARBON CONTENT-INFRARED ABSORPTION METHOD AFTER INDUCTION FURNACE COMBUSTION