room-and-pillar system

英 [room-and-pillar system]
美 [room-and-pillar system]

中文释义

[矿业] 房柱式采煤法

单词分析

单词结构：

room-and-pillar system

字母数：22

记忆提示

🎯 重点记忆：

  • 单词拼写：room-and-pillar system
  • 核心含义：[矿业] 房柱式采煤法

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更新时间：2026-01-07 06:35:11