ring-down trunk signaling

英 [ring-down trunk signaling]
美 [ring-down trunk signaling]

中文释义

振铃式中继传信

单词分析

单词结构：

ring-down trunk signaling

字母数：25

记忆提示

🎯 重点记忆：

  • 单词拼写：ring-down trunk signaling
  • 核心含义：振铃式中继传信

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更新时间：2026-02-04 20:13:26