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When you erase the false letter using the correction tape, you would be confronted with the difficulties often to erase how far since your hand or your correction tape hide the next letter to be erased.
If the usual correction tape has the method erasing from left to right, the 'Backward correction tape' has the method erasing the false letter from right to left. There is no possibility for the letter to be erased to be covered because the letter to be erased shall be erased from the right end of letter to the left by Backward pushing.
Therefore, you are able to know the end point of letter to be erased accurately.
Daegu, South Korea