|  | C |
SECTION C — CHEMISTRY AND METALLURGY

METALLURGY

|  | C22 |
METALLURGY (of iron Fulltext... Hierarchy... Expanded...C21); FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS (production of metals by electrolysis or electrophoresis Fulltext... Hierarchy... Expanded...C25)

|  | C22D |
( transferred to Fulltext... Hierarchy... Expanded...C22B 4/00, Fulltext... Hierarchy... Expanded...C25C )