| 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} |
| 555 | DF | .~ Production of continuous or running length {3} |
| 557 | | .~.~ Including liquid contact {4} |
| 558 | DF | .~.~.~> Including internal liquid contact {1} |
| 560 | DF | .~.~.~> With calibration, mandrel forming or with internal guide |
| 561 | DF | .~.~.~> Contact with liquid coagulant or reactive liquid |
| 562 | DF | .~.~.~> With immersion in liquid bath |