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Prompt & Dlitte gum brake / Product

Prompt & Dlitte gum brake

In general,we don't check the brakes before weride.But it's very unsafe.However,Prompt gum brake can solve this problem simply .You just need to look the energy bar before you ride,to know the wear condition of the brake pad.

University

Ningbo University of Technology

Ningbo University of Technology
Ningbo, China

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