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In the Netherlands, a dike-ring is the area of land that is protected from flooding by an individual dike. As the Netherlands are constantly at risk from floods, the entire nation has been subdivided into dike-ring areas. 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「Dike-ring」の詳細全文を読む スポンサード リンク
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