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Discolored fire extinguis / Fire equipment

Discolored fire extinguis
Discolored fire extinguis

This is a fire extinguisher that changes color over time. Special materials are sprayed on the surface. After a year and a half of air oxidation, the surface color gradually changed from red to white. The red fire extinguisher means everything is normal, and the white fire extinguisher means that the fire extinguishing function may not work properly. Now it is time to send it back to the factory for repair.

University

Wuhan Polytechnic University

Wuhan Polytechnic University
http://www.whpu.edu.cn
Wuhan, China

Lei Chen,
Wuhan Polytechnic University

Jianfeng Yue,
Wuhan Polytechnic University

Weilu Zhao,
Hubei University of Technology

Kun Li,
Wuhan Polytechnic University