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Badminton balls are protected in a cylindrical package. However, the balls are found difficult to be taken out from the cylinder especially when the balls are stuck in the middle of the package. Push Plus Badminton drawing string can solve such problem. It is a very simple tool which you can make it by yourself. The only material that you need is a piece of twisted cotton string.
HUAQIAO UNIVERSITY
Quanzhou, Fujian Province, China
HUAQIAO UNIVERSITY
Quanzhou, Fujian Province, China