Thread: pollution masks in cities?
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Old 04-21-15 | 09:34 AM
  #4  
erig007
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Joined: Sep 2012
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Here are basic studies on masks

My Personal Fit Testing: Here?s the Best and Worst Pollution Mask For Me » MyHealth Beijing
Awesome Trio of Pollution Mask Tests: The Winners and Losers » MyHealth Beijing
Last edited by erig007; 04-21-15 at 09:48 AM.
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