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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 Wheat lamp ： ウィキペディア英語版 Wheat lamp A wheat lamp is a type of incandescent light designed for use in underground mining, named for inventor Grant Wheat and manufactured by Koehler Lighting Products in Wilkes-Barre, Pennsylvania, United States, a region known for extensive mining activity.〔 A safety lamp designed for use in potentially hazardous atmospheres such as firedamp and coal dust, the lamp is mounted on the front of the miner's helmet and powered by a wet cell battery worn on the miner's belt. The average wheat lamp uses a 3-5 watt bulb which will typically operate for 5 to 16 hours depending on the amp-hour capacity of the battery and the current draw of the bulb being used. A grain of wheat lamp is an unrelated, very small incandescent lamp used in medical and optical instruments, as well as for illuminating miniature railroad and similar models. ==References== 〔 〔 (City of Marlborough ), retrieved July 7, 2011. 〕 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「Wheat lamp」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.