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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
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:上向单臂板信号机
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更新时间:2026-02-05 02:44:15