Sign up for an Award
Participate with your entry in one of our professional or student awards.
Sign up for an awardLearn more:
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
The pen combines the cap with the body,as long as one step ,it will be ableto convert.It achieves
some advantages , first of all , it can prevent the capfrom missing , second ,it simplifies the
production of the pen, besides ,it adds fun to using .At the same time ,it is also a manifestation
of resource saving.
College of Science & Technology Ningbo University
Ningbo, China