| 264 / | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| 603 | DF | OUTSIDE OF MOLD SINTERING OR VITRIFYING OF SHAPED INORGANIC ARTICLE OR PREFORM {30} |
| 653 | DF | .~ Including plural heating steps {3} |
| 662 | DF | .~.~ Including diverse heating of article subsequent to sintering {2} |
| 663 | DF | .~.~.~ Subsequent hot pressing (i.e., press molding or by gas pressure) {1} |
| 664 | | .~.~.~.~ Specified temperature or pressure for hot pressing |