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Reposted from ABC2014 13th tweet
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● Please give a thumbs up to the coal miners, the epidemic prevention in coal mines is more difficult than you can imagine
● Can miners use dust masks to prevent viruses? one thing needs to be clear
● How to protect yourself during the return trip?
● Protection advice for those who are about to return to work
● Homemade masks? In fact, masks that meet the GM2626--2006kn95 standard are by your side
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