Preston時間からKano時間への変換
18:51:11
-9
09:51:11
+0
+0
-1
-1
-1
-1
-1
-2
-2
-2
-2
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-2
-2
-2
-2
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-2
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-2
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-2
-2
-2
-2
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-3
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-10