为了解决我省解放汽车后桥螺旋伞齿轮供需紧张的矛盾,加速社会主义建设步伐,根据国内外球墨铸铁(以下简称球铁)发展情况,结合兄弟单位的经验,我厂广大革命职工高举“鞍钢宪法”的伟大红旗,从一九七五年五月初开始大胆闯新,自力更生,土法上马,采用“球铁精铸”新工艺,试制了解放汽车螺旋伞齿轮。(见图1) In order to solve the contradiction between supply and demand of spiral bevel gear at the rear axle of Jiefang Auto in our province and speed up the pace of socialist construction, according to the development of ductile iron at home and abroad (hereinafter referred to as ductile iron) and the experience of brother units, Since its establishment in early May 1975, the Great Red Flag of the Anshan Iron and Steel Constitution has made a bold attempt to break new ground, make its own efforts and adopt the new technology of “ductile iron casting” to try to liberate the automobile spiral bevel gear. (see picture 1)