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Druler is a curved rubber ruler，not only has basic function as normal ruler，but also can measure the diameter of daily products which offerconvenience to users
JiangNan University
WuXI, China
School of Design
JiangNan University
Wuxi, Jiangsu Province, China
Lv Changfu,Yu Zhigang,Chen Chao,Yuan Chenxin
