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The traditional roller skates can be categorized into two types, single row and double rows. The double rows one is relatively stable, easy to control, but with less flexibility. It is suitable for beginners. The single row one is flexible, but not easy to control. It is fit for more skilled person. The easy moving can switch between both types freely by a special shaft structure, making a pair of shoes has a dual function. This can not only greatly reduce costs, but also make the learning process more comfortable.
Dalian Nationalities University
School of Design
Dalian, China
Chengang He,
Dalian Nationalities University
Yidan Chen,
Dalian Nationalities University
Hai Liu,
Dalian Nationalities University
