108 / | HD | HORIZONTALLY SUPPORTED PLANAR SURFACES |
59 | DF | PLURAL RELATED HORIZONTAL SURFACES {11} |
162 | DF | .~ Foldable component {6} |
166 | DF | .~.~ Hinged horizontal surfaces {3} |
167 | DF | .~.~.~ Folded along lateral center line {3} |
170 | .~.~.~.~ Surface section collapses between legs |