excavation of an earth dam with the help of the cable car, victorian engineering, 1890s, 19th century history technology - 橋式起重機 幅插畫檔、美工圖案、卡通及圖標
the construction of the dam at butte, cable lift crane, victorian engineering, 1890s, 19th century history technology - 橋式起重機 幅插畫檔、美工圖案、卡通及圖標纜車 - 商用陸上交通工具