East London時間からBangkok時間への変換
07:23:53
+5
12:23:53
+7
+7
+7
+7
+7
+6
+6
+6
+6
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+3
+3
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+2
+1.5
+1
+1
+1
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-1
-1
-1
-1
-1
-1
-2
-5
-5
-5
-6
-6
-6
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-7
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-9