Conversion de l'heure de Forest à l'heure de Dongguan
18:00:06
+6
00:00:06
+7
+7
+7
+7
+7
+6
+6
+6
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+3
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+2
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-1
-1
-1
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-5
-5
-5
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-6
-6
-7
-7
-8
-9