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upper valve
upper valve
英
[upper valve]
美
[upper valve]
中文释义
上置式气门
单词分析
单词结构:
upper valve
字母数:11
记忆提示
🎯 重点记忆:
单词拼写:upper valve
核心含义:上置式气门
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更新时间:2026-03-11 00:59:15