dumbwaiter
A hoisting and lowering mechanism within a building equipped with a relatively small car which moves in a vertical direction […]
A hoisting and lowering mechanism within a building equipped with a relatively small car which moves in a vertical direction […]
A multiple-dwelling substandard apartment building; commonly three to five stories high, containing relatively long narrow apartments within it; has windows
A series of ducts and associated elbows, connectors, dampers, and air outlets used to convey air from a fan to
A coiled or flat sheet of a gauge width and thickness suitable for use in ductwork.