(under the class definition) Structure peculiar to railway car roofs combined with means situated in the roof under its exterior covering acting to inhibit or retard the passage of heat, sound, vibrations, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
144+, for a building construction with an exposed surface with an acoustical feature, and see notes.
SEE OR SEARCH CLASS
105, Railway Rolling Stock,
238.1+, for railway rolling stock comprising a special car body.
