49 / | HD | MOVABLE OR REMOVABLE CLOSURES |
149 | DF | MOUNTED FOR OPTIONAL MOVEMENTS {12} |
163 | DF | .~ One closure movable separately from or with other closure {4} |
164 | .~.~ Closure slide within swingable frame {1} | |
165 | DF | .~.~.~> Divided frame with pivoted section |