Narva時間からMernda時間への変換
14:18:12
+7
21:18:12
+7
+7
+6
+6
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+5
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-1
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-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
-6
-6
-7
-7
-7
-8
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-10