Повучен
ISO 7404-2:2009 specifies methods for preparing a polished particulate block from a sample of crushed coal for analysis by reflectance microscopy. These methods can also be applied to the preparation of a polished, embedded lump of coal.
ПОВУЧЕН
ISO 7404-2:1985
ПОВУЧЕН
ISO 7404-2:2009
95.99
Повучен
27. 10. 2025.