B class fire-proof door

英 [B class fire-proof door]
美 [B class fire-proof door]

中文释义

[网络] B级防火门

单词分析

单词结构：

B class fire-proof door

字母数：23

记忆提示

🎯 重点记忆：

  • 单词拼写：B class fire-proof door
  • 核心含义：[网络] B级防火门

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更新时间：2026-03-23 18:34:14