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This was a design that was began because we thought that the remaining parts of the blade that were cut off with the worn down blade were a waste.
So the blade was double-bladed and the cutting line of the blade was made into a zigzag so that the blade could be conserved by being used several times more than the existing blades.
Myong-Ji University
Yongin, South Korea
Myong-Ji University
Seoul, South Korea
Moon-Sung Kim
Myong-Ji University
Jeju, South Korea
Kyung-Bin Kim