lining of tunnel portal section

英 [lining of tunnel portal section]
美 [lining of tunnel portal section]

中文释义

洞口段衬砌

单词分析

单词结构：

lining of tunnel portal section

字母数：31

记忆提示

🎯 重点记忆：

  • 单词拼写：lining of tunnel portal section
  • 核心含义：洞口段衬砌

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更新时间：2025-12-08 18:27:02