52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
204.5 | DF | WINDOW OR WINDOW SASH, SILL, MULLION, OR GLAZING {13} |
204.591 | .~ Spacing pane from disparate edging {3} | |
204.593 | DF | .~.~> At least two spaced panes {1} |
204.597 | DF | .~.~> Overlapping edge and face of pane |
204.599 | DF | .~.~> Metallic spring (e.g., strip separator) |