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Theyre useful - we have populated the planet far beyond the level that can be supported by a primitive hunter-gatherer or even a pre-industrialization agriculture model.We require minerals and fossil fuels and so forth, or vast numbers of people.
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.