Dronten時間からChattogram時間への変換
13:45:11
+4
17:45:11
+7
+7
+7
+7
+7
+6
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+6
+6
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+3.5
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+3
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+1.5
+1
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-1
-1
-1
-1
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-2
-5
-5
-5
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-6
-6
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-7
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-9