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Precautions:
     1, a dust mask to see the name, we can easily see that this kind of masks must be used to prevent dust from entering our respiratory system, so that the brightest anti-dust masks rate should be quite high, so in the optional dust masks, we should select those relatively high rate of anti-dust masks.
     2, the choice of masks when we should look at the beginning of the design and fit of masks of our face in the end Gaobu Gao, only that people with face masks very fit, in order to better our nose and mouth with air isolated, so we should select those face masks fit with our high rate.
     3, a mask while having more than two features, you should also look relatively good-looking, it is also appropriate to wear convenient, people feel very comfortable, only wearing these masks, we can devote all our energies to work and study go.
     4. When you are finished using a mask, you can not make masks external bacterial contact, this step is very important, because if that outside masks come into contact with the bacteria, it will directly affect your respiratory system, more serious It could affect your safety.
Some people are not wearing masks, so in the end is what people do not wear a mask for it? Here we take a look at:
    1) If you suffer from respiratory diseases, or have problems with your heart, then you are not suitable to wear masks.
    2) If you are pregnant, then you are also not suitable to wear masks.
    3) dizziness, breathing difficulties if you wear a mask, or your skin is particularly vulnerable to sensitive, then you are not fit to wear masks.
Knowledge dust mask error appears:
   (1) gauze masks can be used to dust, and comfortable to wear
   (2) non-woven dust masks can be cleaned after use, can save costs
   (3) As long as wearing a dust mask will not get pneumoconiosis
     Experts point out that dust masks belong to special labor protection products, countries have specialized their quality standards. Gauze masks to harm the body's largest five microns dust, dust resistance efficiency is only about ten percent, a result spent the money, it failed to play a role to prevent dust hazards. After the dust is electrostatic capture the superfine fiber cloth, very difficult to clean because disengaged, and water will be destroyed electrostatic suction capacity, therefore, non-woven masks are not cleaned, need to be discarded after use. Dust masks have some filtering volume than its filtering capabilities, it is not dust-proof, and no right to wear a dust mask and not dust.