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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 Whimbling iron ： ウィキペディア英語版 Whimbling iron A whimbling iron is a bell clapper made from ductile iron.〔()〕 Traditionally bell clappers were standard cast grey iron with a razor-like crystalline structure that led to sudden catastrophic failure over time. The standard clapper is distinguished by the experienced ear as a whefting iron. Whilst some believe that the advent of "health and safety" led to the search for an alternative, it is more likely that the ability to forge the bottom end ready for use practically died out early in World War II. Some attempts at composite clappers were made, but advances in casting technology, driven as much by the motor industry as by the war, resulted in the adoption of spheroidal graphite iron castings.〔()〕 == References == 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「Whimbling iron」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.