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Wikipedia definition
1. Dutch Water LineThe Dutch Water Line was a series of water based defences conceived by Maurice of Nassau in the early 17th century, and realised by his half brother Frederick Henry. Combined with natural bodies of water, it could be used to transform the economic heartland of the Dutch Republic almost into an island.
Read “Dutch Water Line” on English Wikipedia
Read “洪水線” on Japanese Wikipedia
Read “Dutch Water Line” on DBpedia

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