| 49 / | HD | MOVABLE OR REMOVABLE CLOSURES |
| 73.1 | DF | CLOSURES INTERCONNECTED FOR CONCURRENT MOVEMENT {9} |
| 104 | ![]() | .~ Closures mounted for swinging {4} |
| 105 | DF | .~.~> Treadle or treadle bar interconnector {1} |
| 107 | DF | .~.~> Geared, interconnector or interconnector operator {1} |
| 109 | DF | .~.~> Link or link system interconnected {1} |
| 115 | DF | .~.~> Cable interconnector sheaved on closure pivots |