... ,GB/T8163-2008,GB3087-2008,GB5310-2008,GB6479-2000,GB9948-2006 Material St35.8, St44 ,St52, 20Mn2 ,10, 20,35,45 ... are 360 staff members including 80 technicians in our company. Annual output is 40,000 tons. We also establish an effective ... complete quality control system. In 2006, our company obtained the authorization of ISO9001 Quality System. And ...