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Understanding these causes is key to addressing the problem effectively

If you are a smoker who hasn't yet experienced the authentic feel and satisfaction that an e-cig can bring, you will be amazed at what you've been missing

Last year, we leveled our air filter up even further, with larger air filters

Notes: atm = standard atmospheric pressure, CAS # = Chemical Abstracts Service Number, kPa = kilopascal, m = meter, mg = milligrams, mm Hg = millimeters of mercury, ppm = parts per million

PM10 can enter the upper respiratory tract of the human body, and part of it can be excreted through sputum, etc., and it is also blocked by the villi inside the nasal cavity, which is relatively less harmful to human health