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保持锋利 / scharf bleiben


1.Saving people in need when looking for sharpening whetstone time
2.Simple, convenient, safe
3.Will be able to repair the damaged flank play a role in their daily take the knife


Tianjin Univ of Science&Technology

Tianjin Univ of Science&Technology
TianJin, China


Li, Hao

Li, Hao
TianJin, China

JunFen Zhao( Instructor)Lecturer RenFei Bai ( Instructor)Lecturer Industrial Design Department of Mechanical Engineering, Tianjin University of Scienc