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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 Sperry Rail Service ： ウィキペディア英語版 Sperry Rail Service Sperry Rail Service is a company contracted by most of the major railroads in North America to inspect rail. The rail flaw detector car was invented by Dr. Elmer A. Sperry. To railways and railfans, Sperry's name is most likely associated with the Sperry Rail Detector car. == Defect detection need == There were many early useless efforts of rail defect detecting device development in the late 19th century. Serious train derailments, which were blamed on transverse fissures, were increasing. One of them occurred in 1911, in Manchester, New York, killing 29 and seriously injuring 60. Another killed 21 and injured over 100 near Victoria, Mississippi, in October 1925. The need for dependable rail inspection became apparent. 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「Sperry Rail Service」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.