principal series lines

英 [principal series lines]
美 [principal series lines]

中文释义

[电] 主系线

单词分析

单词结构：

principal series lines

字母数：22

记忆提示

🎯 重点记忆：

  • 单词拼写：principal series lines
  • 核心含义：[电] 主系线

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更新时间：2026-03-25 07:42:09