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Charles River Bridge (Commuter Rail) : ウィキペディア英語版 | Charles River Bridge (Commuter Rail)
The Charles River Bridge is a pair of railroad single-leaf, through-truss, rolling bascule bridges across the Charles River that connects North Station in Boston, Massachusetts to MBTA Commuter Rail lines in northern Massachusetts. == Design and construction == These bridges were designed by Keller & Harrington of Chicago, Illinois and built by the Phoenix Bridge Company of Phoenixville, Pennsylvania. Each bridge uses a over-head concrete counterweight. Originally, there were four bridges, but only two of them remain.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Charles River Bridge (Commuter Rail)」の詳細全文を読む
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