Saint Petersburg時間からSongyang時間への変換
08:18:20
+5
13:18:20
+7
+7
+6
+6
+6
+6
+6
+5
+5
+5
+5
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+5
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+2
+2
+1.5
+1
+0.5
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
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-3
-6
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