Bonga時間からHo Chi Minh City時間への変換
22:00:30
+4
02:00:30
+6
+6
+6
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+5
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+2
+2
+1.5
+1
+0.5
+0
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-1
-1
-1
-1
-1
-1
-2
-2
-2
-2
-2
-3
-3
-6
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-10