| 264 / | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| 41 | DF | PORE FORMING IN SITU (E.G., FOAMING, ETC.) {6} |
| 45.1 | DF | .~ Composite article making {7} |
| 45.8 | DF | .~.~ Forming indefinite length continuous work {2} |
| 45.9 | DF | .~.~.~ Including extrusion {1} |
| 46.1 | | .~.~.~.~ With subsequent application of shaping force to form final desired shape |