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қатты бөлшектер
Any material, except pure water, that exists in the solid or liquid state in the atmosphere. The size of particulate matter can vary from coarse, wind-blown dust particles to fine particle combustion products. For more information, please take alook at our PM brochure.
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Celebrated on the 1st of April each year, April Fools' Day is a time when people, and increasingly businesses, play all kinds of good humored or funny ...
