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Description 1. Cotton face mask which is used to improve the air you breathe when you are outside on bad air days. 2. Typical Uses Filtering the air when you are working in an area with a high concentration of air pollution, chemicals, dust, smoke, pollen, ash, mold, clay, etc. 3.

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The masks Fully UK certified and conform to EN149:2001 and A1:2009. With a FFP3 protection level, these masks will protect lungs against very fine particles (less than 2 microns). his valved version with activated carbon helps absorb smells and odours (below the OEL) Disposable Mask Protection Levels FFP1 Particles larger than 5 microns.

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May 03, 2020 · The Asahi Shimbun is widely regarded for its journalism as the most respected daily newspaper in Japan. The English version offers selected articles from the vernacular Asahi Shimbun…

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May 01, 2018 · Activation energies for the three structural directions of the amphibolite are in the range of 0.71-0.75 eV. The amphibolite shows velocity anisotropy (4.15-4.86 per cent for Vp and 5.29-5.84 per cent for Vs at 0.25-1.0 GPa) and electrical conductivity anisotropy (11.1-25.2 per cent). Based on the regional crust model