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safety helmet / helmet

safety helmet

Mine disaster occurred every year , will bring harm to miners , and how to minimize the damage
of the miners . The time of the accident site if enough clean water , the miners will be mine longer
adhere to the arrival of rescue workers . The helmet with a conventional helmet are very different ,
and it has a layer of the filter and a layer such as the semipermeable membrane of the micro-elements
over the strainer and straw . When the accident site at the time , as long as there is water , regardless
dirty not dirty , use a helmet to filter . The filter can filter out impurities such as small stones and sand ,
while the micro- element fi

University

Ningbo Institute of Technology

Ningbo Institute of Technology
Ningbo, China

Design

Ningbo Institute of Technology

Ningbo Institute of Technology
Ningbo, China

Xinfeng Shi Shengjie Yang He Zhang