| 264 / | HD | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| 138 | DF | WITH SEVERING, REMOVING MATERIAL FROM PREFORM MECHANICALLY, OR MECHANICALLY SUBDIVIDING WORKPIECE {10} |
| 154 | DF | .~ Making hole or aperture in article {1} |
| 155 | | .~.~ By punching or drilling {1} |
| 156 | DF | .~.~.~> Plurality of holes |