108 / | HD | HORIZONTALLY SUPPORTED PLANAR SURFACES |
115 | DF | FOLDING {9} |
129 | DF | .~ Legs fold axially parallel to surface edges {2} |
131 | .~.~ Releasable means holds paired legs in predetermined position {2} | |
132 | DF | .~.~.~> Legs folded adjacent surface |
133 | DF | .~.~.~> Spring biased |