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Silicosis usually occurred against a background of coal workers pneumoconiosis only 7.2 of lungs without coal workers pneumoconiosis showed silicosis.Transportation workers showed the highest prevalence of silicosis, while workers more primarily engaged in surface activities at underground mines have the lowest prevalence.
We are a large-scale joint-stock enterprise integrating scientific research, production and sales.Our leading products have crushing equipment, sand making equipment, mobile crusher, etc., Each type of product is with complete specifications. All products have passed ISO9001, CE and GOST international quality system certification.