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ravelin

/'rævlin/

📖 中文释义

  1. n. V形棱堡
📘 English Definition（英文释义）
  1. n. A detached work with two embankments which make a salient
  2. angle. It is raised before the curtain on the counterscarp of the
  3. place. Formerly called demilune, and half-moon.
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