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easy safety hammer watch / easy safety hammer watch

easy safety hammer watch

The design for the men is portable safety hammer.
The shape and appearance the same as common watches.
you can touch to know time in normal time,triangle stands
for hours,round stands for minutes. When you in danger ,
You only need press on the crown which on the side of watch.


College of Science&Technology

College of Science&Technology
Ningbo university
ningbo, China

xiaoliang zhao,
school of software technology zhejiang university

menrong hou, lian xue,

lei shi

junjie feng