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Beer bottle opener / a bottle opener

Beer bottle opener
Beer bottle opener

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.

University

North China University of Technology

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