ISO 7404-4 : 2017-08现行
METHODS FOR THE PETROGRAPHIC ANALYSIS OF COALS - PART 4: METHOD OF DETERMINING MICROLITHOTYPE, CARBOMINERITE AND MINERITE COMPOSITION
出版：International Organization for Standardization
专家解读视频
Gives a method, using a graticule with 20 crossline intersections, for determining the proportions of microlithotypes, carbominerite and minerite in coals.
NEN ISO 7404-4 : 2017 - Identical
PN ISO 7404-4 : 2006 - Identical
BS ISO 7404-4 : 2017 - Identical
NEN ISO 7404-4 : 2017 - Identical
BS ISO 7404-4 : 2017 - Identical
