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.
Generally,T shape ruler often has long length with a lot of limitations in carrying and use .Where to place and how to regular are also rather difficult.T shape ruler,which can be rolled up,not only avoid this problem well but also not affect its function.
He'nan University of Technology
Zhengzhou City, Henan Province, China