... coal gangue, shale, coal cinder.2) It is a new type of practical patented equipment, and it is equivalent to the combination ... Co., LTD, ABOUT COMPANY:Zhengzhou Dayang Briquette Equipment Co., Ltd. was established in Gongyi in 1990, and replaced to Zhengzhou in ... North Korea, Zambia, Egypt, etc. Holding the concept of “surviving by quality and developing by credit”, our company strives to build a brand ...