manual telephone exchanging system

[manual telephone exchanging system]
[manual telephone exchanging system]

中文释义

人工电话交换制

单词分析

单词结构:

manual telephone exchanging system

字母数:34

记忆提示

🎯 重点记忆:

  • 单词拼写:manual telephone exchanging system
  • 核心含义:人工电话交换制