room and pillar mining

英 [room and pillar mining]
美 [room and pillar mining]

中文释义

房柱式采煤法

单词分析

单词结构：

room and pillar mining

字母数：22

记忆提示

🎯 重点记忆：

  • 单词拼写：room and pillar mining
  • 核心含义：房柱式采煤法

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更新时间：2025-12-21 14:21:23