Zhengzhou Blackstone Machinery co.,ltd was established in 2010,mainly engaged in exporting and manufacturing of industrial equipments.its predecessor is Shenzhen Hongyuan Industrial Equipment Group founded in 1987,a famous production and trade group.with the strategic thinking of international,collectivization,professionalization ,we established Henan Hongyuan Machinery Co., Ltd.,Zhengzhou Braintex co.,ltd,Henan jincheng filtering equipments co.,ltd,Zhengzhou Blackstone Machinery ...