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Резюме
View of the back of the hydraulic tunnel shield installed during construction in the south tube of the North River Tunnels under the Hudson River. The North River Tunnel project was part of the larger New York Tunnel Extension project of the Pennsylvania Railroad.
Тэги
туннели северной реки
строительство железной дороги в Пенсильвании
строительство туннелей в сша
tunnelling equipment
Дата
03/10/1905
Источник
Wikimedia Commons
Ссылка
Информация о правах
public domain