A Description of the Westinghouse Electro-Pneumatic Interlock Switch and Signal System Installed in the Yards of the Pennsylvania Union Station, Pittsburg, Penna., by the Union Switch and Signal Company.(5000 w.)
A description of the Westinghouse electro-pneumatic interlock switch and signal system installed in the yards of the Pennsylvania union station, Pittsburg, Penna., by the union switch and signal company
Pro Engrs Soc W Penn
1892
Ill.
Aufsatz (Zeitschrift)
Englisch
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