manual toll switching system

英 [manual toll switching system]
美 [manual toll switching system]

中文释义

长途人工电话交换机

单词分析

单词结构：

manual toll switching system

字母数：28

记忆提示

🎯 重点记忆：

  • 单词拼写：manual toll switching system
  • 核心含义：长途人工电话交换机

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更新时间：2026-02-04 22:40:10