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bottom-hole safety valve
bottom-hole safety valve
英
[bottom-hole safety valve]
美
[bottom-hole safety valve]
中文释义
井底安全阀
单词分析
单词结构:
bottom-hole safety valve
字母数:24
记忆提示
🎯 重点记忆:
单词拼写:bottom-hole safety valve
核心含义:井底安全阀
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更新时间:2026-01-20 18:40:21