in band voice frequency signalling device

[in band voice frequency signalling device]
[in band voice frequency signalling device]

中文释义

带内音频振铃装置

单词分析

单词结构:

in band voice frequency signalling device

字母数:41

记忆提示

🎯 重点记忆:

  • 单词拼写:in band voice frequency signalling device
  • 核心含义:带内音频振铃装置