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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 Johnson Bar (locomotive) ： ウィキペディア英語版 Johnson Bar (locomotive) ''For other uses of the term ''Johnson bar'', see Johnson bar (disambiguation)''. A Johnson Bar is a control lever on a steam locomotive, used to control the timing of the admission of steam into the locomotive's pistons. By controlling this timing, the amount of power delivered to the wheels is regulated, as is the direction that the wheels rotate, giving the lever the alternate name of the reversing lever. ==History== Historians have not identified the reasons why engineers called the reversing lever a Johnson Bar, but the reversing lever is described in both British, and American railway journals of the time. The best accreditation of the invention is documented under the Walschaerts valve gear. 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「Johnson Bar (locomotive)」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.