downward shaft deepening method

英 [downward shaft deepening method]
美 [downward shaft deepening method]

中文释义

下向井筒延深法

单词分析

单词结构：

downward shaft deepening method

字母数：31

记忆提示

🎯 重点记忆：

  • 单词拼写：downward shaft deepening method
  • 核心含义：下向井筒延深法

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更新时间：2026-02-02 12:48:31