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 |