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} |
544 | DF | .~ Starting material is nonhollow planar finite length preform or product is finite length {6} |
553 | DF | .~.~ Including use of vacuum {1} |
554 | .~.~.~ Including use of male mold part which determines the final shape of at least a portion of the work |