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} |
46.4 | DF | .~.~ Shaping material and uniting to a preform or solidified layer {5} |
46.9 | .~.~.~ On a preform or solidified layer which is spherical, toroidal, or annular |