According to the boar's long mouth. At that time, when the German army launched a poison gas bomb to attack, it found that the wild boar buried its nose in the soil and escaped death. Later, it was found that the long nose of the wild boar arched the ground, allowing the soil particles to filter the poison gas, so it made a gas mask by simulating the mouth of the wild boar and added charcoal to filter. Gas masks are personal labor protection articles as well as personal protection articles. They are worn on the head to protect people's respiratory organs, eyes and face, and to prevent toxic gases, dust, bacteria, toxic and harmful gases or vapors ..
View full text>
