Dearye company honor 1,ISO9001:2000 2,National patent ... Zone of Zhengzhou, capital of Henan province, the company has an area of 35000 sqm, fixed assets over ... technical personnel covering 20% of the total employees. The company has passed the ISO9001:2000 quality system certification. It ... and member of China Sand Association.In 2006, the company has been recognized by Ministry of Commerce and gained ...