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Ratating Spanner / spanner

Ratating Spanner
Ratating Spanner

The spanner is one of the common tools in our life. But there still are some shortcomings in the ordinary spanner , for example ,its size is fixed and can not be changed flexibly. We are inspired with the camera aperture , and then adjustable spanner is prompted . You may push and pull the modifying button with one hand during using ,so as to change the size of the spanner to satisfy different nuts.Each spanner has 5 optional sizes to meet different requirement . It can both improve efficiency and save material.

University

BEIJING INSTITUTE OF FASHION TECHNOLOGY

BEIJING INSTITUTE OF FASHION TECHNOLOGY
Beijing, China

Qi Qiu,
BEIJING INSTITUTE OF FASHION TECHNOLOGY