bit under-reaming

英 [bit under-reaming]
美 [bit under-reaming]

中文释义

扩底钻头

单词分析

单词结构：

bit under-reaming

字母数：17

记忆提示

🎯 重点记忆：

  • 单词拼写：bit under-reaming
  • 核心含义：扩底钻头

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更新时间：2026-03-17 02:51:33