Cross-reference collection in which the metallic* stock or a component thereof has the property of abnormally low or absent electric resistance at temperatures which approach absolute zero.
SEE OR SEARCH THIS CLASS, SUBCLASS:
662, for composites having a niobium stannite component.
SEE OR SEARCH CLASS
420, Alloys or Metallic Compositions,
901, for a cross-reference collection of superconductive alloys.
