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upper quadrant single arm semaphore signal
upper quadrant single arm semaphore signal
英
[upper quadrant single arm semaphore signal]
美
[upper quadrant single arm semaphore signal]
中文释义
un. 上向单臂板信号机
单词分析
单词结构:
upper quadrant single arm semaphore signal
字母数:42
记忆提示
🎯 重点记忆:
单词拼写:upper quadrant single arm semaphore signal
核心含义:un. 上向单臂板信号机
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更新时间:2025-12-08 11:40:01