29 / | HD | METAL WORKING |
592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
898 | DF | .~ Process for making bearing or component thereof {13} |
898.04 | DF | .~.~ Rotary bearing {3} |
898.06 | DF | .~.~.~ Anti-friction bearing or component thereof {7} |
898.067 | .~.~.~.~ Cage making |