GB/T 5686.7-2008
AbolishedFerromanganese, ferromanganese-silicon,, nitrogen-bearing ferromanganese and manganese metal - Determination of sulfur content - Infrared absorption method and combustion-neutralization method
锰铁、锰硅合金、氮化锰铁和金属锰 硫含量的测定 红外线吸收法和燃烧中和滴定法