29 / | HD | METAL WORKING |
592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
428 | DF | .~ Assembling or joining {21} |
525.01 | DF | .~.~ By applying separate fastener {5} |
525.13 | .~.~.~ With supplemental joining {2} | |
525.14 | DF | .~.~.~.~> Metal fusion joining |
525.15 | DF | .~.~.~.~> At least one part nonmetallic |