Bashanet時間からCovina時間への変換
20:30:02
-10
10:30:02
+7
+7
+6
+6
+6
+6
+6
+5
+5
+5
+5
+5
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+2.5
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+2.5
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+2.5
+2
+2
+1.5
+1
+0.5
+0
+0
+0
+0
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
-6
-6
-6
-7
-7
-8
-8
-9
-10