primary standard hardness machine

英 [primary standard hardness machine]
美 [primary standard hardness machine]

中文释义

原级标准硬度机

单词分析

单词结构：

primary standard hardness machine

字母数：33

记忆提示

🎯 重点记忆：

  • 单词拼写：primary standard hardness machine
  • 核心含义：原级标准硬度机

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更新时间：2025-12-08 13:34:07