Ravenna時間からTrà Vinh時間への変換
14:46:16
+5
19:46:16
+7
+7
+7
+7
+7
+6
+6
+6
+6
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+3
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+1
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-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
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-6
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-9