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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Helena Bridge ： ウィキペディア英語版 Helena Bridge The Helena Bridge is a cantilever bridge carrying U.S. Route 49 across the Mississippi River between Helena, Arkansas and Lula, Mississippi. The main cantilever span was modeled on the similar Benjamin G. Humphreys Bridge which had been built downstream by Arkansas and Mississippi roughly two decades earlier. However, the river navigation issues that led to the replacement of the Humphreys Bridge with the Greenville Bridge do not apply to the Helena Bridge, as the river curve here is far less severe than the one just upstream from the Humphreys and Greenville Bridges. ==References== 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「Helena Bridge」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.