Gimbi時間からCasablanca時間への変換
17:23:05
-2
15:23:05
+6
+6
+6
+6
+6
+5
+5
+5
+5
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+2
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+1
+0.5
+0
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-1
-1
-1
-1
-2
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-2
-2
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-3
-3
-6
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-11