... Zone of Zhengzhou, capital of Henan province, the company has an area of 35000 sqm, fixed assets ... personnel covering 20% of the total employees. The company has passed the ISO9001:2000 quality system certification. It ... member of China Sand Association.In 2006, the company has been recognized by Ministry of Commerce and gained ... and YUKEN Japan,it is feature of fast speed,high output and full function.