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出典:『Wikipedia』 (2011/06/19 13:22 UTC 版)

英語による解説

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Atherton Bridge is a historic iron truss bridge on Bolton Road in Lancaster, Massachusetts, spanning the South Branch of the Nashua River. It is a rare example of a hybrid pony truss that is similar to the 19th century truss design of Simeon S. Post. It was built by J.H. Cofrode & Co. of Philadelphia in 1870. It was the first iron bridge to be constructed in the town.