Severomorsk時間からGeorgetown時間への変換
18:59:13
-7
11:59:13
+6
+6
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+2
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+1
+0.5
+0
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-1
-1
-2
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-2
-2
-2
-2
-2
-3
-3
-6
-6
-6
-6
-7
-7
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-9
-10