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Albert Hunt
Albert Hunt was the inventor of the wigwag, a grade crossing signal used in transportation. Hunt was a mechanical engineer from Southern California. He invented the wigwag in 1909 out of the necessity for a safer railroad grade crossing. Hunt was associated with the Pacific Electric interurban streetcar railroad.
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「Albert Hunt」の詳細全文を読む
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