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From year to year search before present time bp.Use slider to set year in rough steps, and input fields to fine tune.Modifiers use quotes to match two words in sequence.Use a minus sign in front of a word to exclude it e.
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.