East London時間からBedford時間への変換
05:15:07
-7
22:15:07
+7
+7
+7
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+7
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+6
+6
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+3
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+1.5
+1
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-1
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-1
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-2
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-5
-5
-5
-5
-6
-7
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-7
-8
-10