In this subclass, the following terms or expressions are used with the meanings indicated:
"metallic powder" covers powders containing a substantial proportion of non-metallic material;
"powder" includes somewhat larger particles which are worked, obtained or behave in a manner similar to powder, e.g. fibres.
The production of metal powder is classified in this subclass insofar as the invention relates to the preparation of powder with specific physical characteristics. [3]