Explanatory notes
… used for the manufacture of springs, of clock or watch parts, of tools, etc.); and with nickel. These alloys are, … parts of instruments, etc., are, however, excluded (see particularly Chapters 85 and 90 ). (B) CHROMIUM Chromium is … (D) VANADIUM Vanadium is mainly extracted from the ores patronite or carnotite, usually by reduction of the oxide, …