29 / | HD | METAL WORKING |
592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
888 | DF | .~ Prime mover or fluid pump making {12} |
888.09 | .~.~ Connecting rod making {2} | |
888.091 | DF | .~.~.~> Including metallurgical bonding |
888.092 | DF | .~.~.~> Including metal forging or die shaping |