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Скрантон — Опытная эксплуатация троллейбуса (1903)
Perspective of trolley poles, showing arrangements for holding wheels in contact with feed wires, spreading the latter, and trolley wheel disengaging device
Street Railway Journal, vol. 22, no. 20 (11/14/1903), page 885
Ноябрь 1903 г. Прислал AlexSan
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