Abobo時間からSt Clair時間への変換
18:14:13
+11
05:14:13
+7
+7
+7
+6.5
+6
+6
+6
+6
+5.5
+5.5
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+3
+3
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+2
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+1
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+1
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+0
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-3
-3
-3
-3
-4
-4
-5
-5
-6
-7