การแปลงเวลาDiffaเป็นเวลาSel’tso
13:51:00
+2
15:51:00
+7
+7
+7
+7
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+5.5
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+4.5
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+4.5
+4
+4
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+3
+2.5
+2
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+2
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+2
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+1
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+1
+0
+0
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+0
-1
-4
-4
-4
-5
-5
-5
-6
-6
-7
-8