Gubkin時間からIbeto時間への変換
17:50:47
-2
15:50:47
+7
+7
+6
+6
+6
+6
+6
+5
+5
+5
+5
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+2
+2
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+1
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+0
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+0
+0
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-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-3
-6
-6
-6
-7
-7
-7
-8
-8
-9
-10