frictional back gear

英 [frictional back gear]
美 [frictional back gear]

中文释义

摩擦背轮

单词分析

单词结构：

frictional back gear

字母数：20

记忆提示

🎯 重点记忆：

  • 单词拼写：frictional back gear
  • 核心含义：摩擦背轮

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更新时间：2026-03-18 06:02:15