nonmechanized coal mining

[nonmechanized coal mining]
[nonmechanized coal mining]

中文释义

煤矿非机采型

单词分析

单词结构:

nonmechanized coal mining

字母数:25

记忆提示

🎯 重点记忆:

  • 单词拼写:nonmechanized coal mining
  • 核心含义:煤矿非机采型