lining of tunnel portal section

[lining of tunnel portal section]
[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