Itsukaichi時間からAlexandria時間への変換
21:20:31
-6
15:20:31
+1
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-1
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-1
-1
-1
-1
-1
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-1
-1
-1
-1
-1
-1
-1
-1
-1
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-1
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-1
-1
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-12
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-12