Learning on 04/ 5/2026
航空無線通信士 フォネティックコード 無線工学Apr 5, 2026, 3:35:05 AM
Study time: 1 minute(s)
Today's learning: 4
Consecutive study days: 4
Difficult review: 1
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Apr 5, 2026, 3:35:05 AM
Study time: 1 minute(s)
Today's learning: 4
Consecutive study days: 4
Difficult review: 1