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Randomly selected mining operations in all of the major mining sectors i., coal, metal, nonmetal, stone, and sand and gravel received the survey and had the option of completing a paper or web-based questionnaire.A total of 737 mining operations returned completed questionnaires and reported data for 9,008 employees.
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.