| 264 / | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| 500 | DF | DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK {14} |
| 519 | DF | .~ Differential temperature conditioning {2} |
| 520 | DF | .~.~ Including application of internal fluid pressure to hollow finite length preform to force same into conformity with female mold part {1} |
| 521 | | .~.~.~ Heating |