NA 121
DIN Standards Committee Tools and Clamping Devices
Standards
[CURRENT]
DIN 22020-2
DIN 22020-2
Investigations of raw material in hard-coal-mining - Microscopical examination of hard coal, coke and briquettes - Part 2: Preparation of polished surface from lump material and particulate blocks
Title (German)
Rohstoffuntersuchungen im Steinkohlenbergbau - Mikroskopische Untersuchungen an Steinkohle, Koks und Briketts - Teil 2: Herstellung von Körnerschliffen und Stückschliffen