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 |