drum manhole

英 [drum manhole]
美 [drum manhole]

中文释义

汽包观察孔

单词分析

单词结构：

drum manhole

字母数：12

记忆提示

🎯 重点记忆：

  • 单词拼写：drum manhole
  • 核心含义：汽包观察孔

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更新时间：2026-03-16 10:46:01