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Bicycle is a very common means of transportation, which is combined with the bicycle rear frame and the vehicle lock.
On the basis of retaining the basic functions of the rear frame, it solves a series of problems, such as carrying car lock, and so on.
Jiangxi University of Finance and
Economics
Nan Chang, China
Xingsheng Yan,
Jiangxi University of Finance
tianci zhang,
Jiangxi University of Finance
