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.
Unsupported browser
You are using an outdated browser. Please upgrade your browser to improve your experience.
It is well known that the demand is the source of the invention and innovation.Because of the profound understanding of that,we spare no effort to discover the need of people in every area. Benefiting from the great effort we have made in the past few months,we have found numerous special requirements, and the one interested us most is the demand for a portable opener.
North China University of Technology
beijing, China
jianwei chai,
North China University of Technology
yuhui li,
North China University of Technology
yu zhang,
North China University of Technology
qiuying yang,
North China University of Technology
