| 264 / | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
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| 165 | DF | FORMING CONTINUOUS OR INDEFINITE LENGTH WORK {8} |
| 176.1 | DF | .~ Shaping by extrusion {11} |
| 209.1 |  | .~.~ Hollow article {5} |
| 209.2 | DF | .~.~.~> Including rotational or translational movement of a material shaping member |
| 209.3 | DF | .~.~.~> Reshaping product (extrudate) subsequent to extrusion {1} |
| 209.6 | DF | .~.~.~> Curing or polymerizing operation during extrusion (e.g., cross-linking, vulcanizing, etc.) |
| 209.7 | DF | .~.~.~> At least two distinct operational temperatures employed during the extrusion operation |
| 209.8 | DF | .~.~.~> Providing special flow channel feature (e.g., varying dimension of flow channel or varying direction of flow of material in the extruder, etc.) |