unoccupied track circuit

英 [unoccupied track circuit]
美 [unoccupied track circuit]

中文释义

空闲轨道电路

单词分析

单词结构：

unoccupied track circuit

字母数：24

记忆提示

🎯 重点记忆：

  • 单词拼写：unoccupied track circuit
  • 核心含义：空闲轨道电路

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更新时间：2026-02-03 10:05:19