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.
when drink ring-pull cans,We will have a headache problem that is how to dig out the ring-pull.No long nails or fingers thick friends it is hard to dig out the ring-pul.30°ring-pull can can easily solve these problems.The ring-pull on the product 30 ° inclined upwards,for you are more easily to use ring-pull.
South China University of Technolog
panyu district,Guang zhou city, China
lijun Yan,
university of south china