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William Howard (engineer) : ウィキペディア英語版
William Howard (engineer)
William Howard (1793–1834) was an American mechanical engineer who was one of the first to work for the Baltimore and Ohio Railroad. When the railroad built its first cars using friction bearings first developed by Ross Winans, Howard made his own design and patented it on November 2, 1828.
==References==

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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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