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R11 (New York City Subway car)
The R11 New York City Subway cars, built by the Budd Rail Car Company, were part of a new technology prototype test train ordered as a new fleet for the Second Avenue Subway in 1949, a line that was never built. The new technology included "precipitron" sterilizing lamps, under-seat heaters, and damper control of fresh and recirculated air through ceiling and under-seat diffusers.
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