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155mm shells, one of the many items produced during the WWI period
155mm shells, one of the many items produced during the WWI period
New York Air Brake gauges to control a Rotair Valve Westinghouse Air brake
New York Air Brake gauges to control a Rotair Valve Westinghouse Air brake
The Westinghouse Building in Wilmerding, Pennsylvania, pictured in 2009
The Westinghouse Building in Wilmerding, Pennsylvania, pictured in 2009
Westinghouse Air Brake Company's Rotair Valve
Westinghouse Air Brake Company's Rotair Valve