การแปลงเวลาTchambaเป็นเวลาChattogram
13:47:00
+6
19:47:00
+7
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+6
+6
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+5.5
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+3.5
+3
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+3
+3
+3
+3
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+2
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+1
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+0
-3
-3
-3
-4
-4
-4
-5
-5
-6
-7