148 / | HD | METAL TREATMENT |
95 | DF | PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17} |
516 | DF | .~ Producing or treating layered, bonded, welded, or mechanically engaged article or stock as a final product {9} |
527 | DF | .~.~ With metal next to or bonded to metal {4} |
528 | .~.~.~ With brazing or soldering |