underground ramp development system

英 [underground ramp development system]
美 [underground ramp development system]

中文释义

地下斜坡道开拓

单词分析

单词结构：

underground ramp development system

字母数：35

记忆提示

🎯 重点记忆：

  • 单词拼写：underground ramp development system
  • 核心含义：地下斜坡道开拓

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更新时间：2025-12-18 23:42:00