454 / | HD | VENTILATION |
254 | DF | HAVING INLET AIRWAY {11} |
284 | DF | .~ Including specific air distributor (e.g., register, etc.) {14} |
309 | DF | .~.~ Louvered air distributor {3} |
313 | .~.~.~ Moveable {5} | |
314 | DF | .~.~.~.~> Aligned mutiple, movable sets of vanes {1} |
316 | DF | .~.~.~.~> Repositionable set |
317 | DF | .~.~.~.~> Rotating disks |
318 | DF | .~.~.~.~> Louver vanes form valve |
319 | DF | .~.~.~.~> Plural vanes pivoting about individual axes {1} |