… cadmium, germanium, vanadium, gallium, indium and niobium (columbium), and articles of these metals, including waste …
Explanatory notes
… cadmium, germanium, vanadium, gallium, indium and niobium (columbium), and articles of these metals, including waste … a precious stone (e.g., emerald) ( Chapter 71 ). The main commercial methods of extracting this metal are : (1) High … A graphite crucible is used as anode and the metal is collected on a water‑cooled iron cathode. (2) Reduction of …