| 49 / | HD | MOVABLE OR REMOVABLE CLOSURES |
| 73.1 | DF | CLOSURES INTERCONNECTED FOR CONCURRENT MOVEMENT {9} |
| 104 | DF | .~ Closures mounted for swinging {4} |
| 107 | ![]() | .~.~ Geared, interconnector or interconnector operator {1} |
| 108 | DF | .~.~.~> Drives lever pivoted on closure |