| 49 / | HD | MOVABLE OR REMOVABLE CLOSURES |
| 208 | DF | MOUNTED FOR MULTIDIRECTIONAL OR OBLIQUE MOVEMENT {7} |
| 209 | DF | .~ Initial or terminal movement transverse to sliding movement edgewise of portal {6} |
| 216 | DF | .~.~ Moves transversely on link {2} |
| 217 | ![]() | .~.~.~ Closure pivoted to tilting link-carriage |