This class includes:
——mining of lignite (brown coal): underground or surface mining, including mining through liquefaction methods
——washing, dehydrating, pulverizing, compressing of lignite to improve quality or facilitate transport or storage

This class excludes:
——hard coal mining, see 0510
——peat digging, see 0892
——test drilling for coal mining, see 0990
——support activities for lignite mining, see 0990
——manufacture of lignite fuel briquettes, see 1920
——work performed to develop or prepare properties for coal mining, see 4312