Investigations of the raw material in hard-coal-mining; microscopical examination of hard coal, coke and briquettes; terms, survey of processes and their applications— 7 стр.
Investigations of the raw material in hard-coal-mining; microscopical examination of hard coal, coke and briquettes; preparation of polished surface from lump material and particulate samples— 5 стр.
Investigations of raw material in hard-coal-mining - Microscopical examination of hard coal, coke and briquettes - Part 1: Terms, survey of processes and their applications— 7 стр.
Investigations of the raw material in hard-coal-mining; microscopical examination of hard coal, coke and briquettes; terms, survey of processes and their applications— 7 стр.