264 / | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
165 | DF | FORMING CONTINUOUS OR INDEFINITE LENGTH WORK {8} |
176.1 | DF | .~ Shaping by extrusion {11} |
178 R | DF | .~.~ Into a liquid bath {6} |
182 | .~.~.~ Polyacrylonitrile containing extrudant |