Balad時間からVangviang時間への変換
17:21:03
+4
21:21:03
+7
+7
+6
+6
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+5
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+2
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+1
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+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
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-6
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-10