Објављен
This document specifies methods for preparing a polished particulate block from a sample of crushed coal for analysis by reflected light microscopy. These methods can also be applied to the preparation of a polished, embedded lump of coal.
ПОВУЧЕН
ISO 7404-2:2009
ОБЈАВЉЕН
ISO 7404-2:2025
60.60
Стандард објављен
27. 10. 2025.