down-the-hole shaftboring machine

[down-the-hole shaftboring machine]
[down-the-hole shaftboring machine]

中文释义

井筒掘进机

单词分析

单词结构:

down-the-hole shaftboring machine

字母数:33

记忆提示

🎯 重点记忆:

  • 单词拼写:down-the-hole shaftboring machine
  • 核心含义:井筒掘进机