CPC Subgroup
C25C 3/22 Collecting emitted gases
Full Title
Electrolytic production, recovery or refining of metals by electrolysis of melts (C25C5/00 takes precedence) > of aluminium > Collecting emitted gases
C25C 3/22 Electrolytic production, recovery or refining of metals by electrolysis of melts (C25C5/00 takes precedence) > of aluminium > Collecting emitted gases