Goldlight Steel Ball Factory was established in 1980 in Shangdong province .The enterprise covers an area of 160,000? .At present ,it has 2,600 workers ,184 technicians including 48 senior ones .Up to now ,it has strong technical force and powerful productivity . The Company has advanced production equipment, perfect testing instruments ,such as 48 cold Tun machines , 22 4980-Vertical photosphere