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plano-concave

/,pleinәj'kɔnkeiv,-kɔn'keiv/

📖 中文释义

  1. a. (透镜)平凹的
📘 English Definition(英文释义)
  1. a. Plane or flat on one side, and concave on the other;
  2. as, a plano-concave lens. See Lens.