non-return flap

英 [non-return flap]
美 [non-return flap]

中文释义

止回瓣

单词分析

单词结构：

non-return flap

字母数：15

记忆提示

🎯 重点记忆：

  • 单词拼写：non-return flap
  • 核心含义：止回瓣

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更新时间：2026-03-21 10:21:47