ring down system signaling equipment

英 [ring down system signaling equipment]
美 [ring down system signaling equipment]

中文释义

振铃制信号设备

单词分析

单词结构：

ring down system signaling equipment

字母数：36

记忆提示

🎯 重点记忆：

  • 单词拼写：ring down system signaling equipment
  • 核心含义：振铃制信号设备

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更新时间：2026-02-09 00:56:12