Goderich時間からGreat Kills時間への変換
14:54:58
-4
10:54:58
+7
+7
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+6.5
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+6
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+5.5
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+5.5
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+2
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+1
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+1
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+0
-3
-3
-3
-4
-4
-4
-5
-5
-6
-7