Borne時間からCarora時間への変換
08:30:31
-6
02:30:31
+7
+7
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+6
+6
+6
+6
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+3
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+2
+1.5
+1
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-1
-1
-1
-1
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-2
-5
-5
-5
-6
-6
-6
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-9