secondary line switch

英 [secondary line switch]
美 [secondary line switch]

中文释义

第二级寻线机

单词分析

单词结构：

secondary line switch

字母数：21

记忆提示

🎯 重点记忆：

  • 单词拼写：secondary line switch
  • 核心含义：第二级寻线机

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更新时间：2026-01-30 16:49:47