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Due to the high possibility of hurt others hand and slide when the pencil is being used . The design for these shortcomings, according to ergonomics, design and fingers grasping grooves on the pen adapter gasket. Its material selection flexibility larger silica, may change according to the shape of the inner wall of the gasket during the production of the pen.
Chengdu University of Technology
ChengDu, China
YanHui Chen,
Chengdu University of Technology