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马路危险警告 / Road hazard warning

马路危险警告
马路危险警告

This product are mainly used in situations manhole covers stolen.When the outer ring was squeezed, the sensor can squeeze the stored energy into electrical energy.When the manhole covers were stolen,switch will bounce.And light tube will turn to red.This product can Avoid much accidents.

University

Zhejiang University, Ningbo Institute of Technology

Zhejiang University, Ningbo Institute of Technology
Ningbo, China

Design

Zhejiang University, Ningbo Institute of Technology

Zhejiang University, Ningbo Institute of Technology
Ningbo, China

Riyu Liu Lu Liu Hui Shen