由天津大学和青岛第四铸造机械厂共同研制的S1420型转子混砂机,于1989年12月1日在青岛第四铸造机械厂通过了部级鉴定。鉴定结论认为:(1)技书文件和图样齐全、完整、统一、正确、清晰,符台国家及行业有关标准规定;标准化、通用化程度较高,能指导生产和应用。(2)经山东省机械工业厅铸造机械产品质 The S1420 Rotor Mixer, jointly developed by Tianjin University and Qingdao No.4 Foundry Machinery Factory, passed the ministry level appraisal at Qingdao No.4 Foundry Machinery Factory on December 1, 1989. Appraisal concluded that: (1) technical documents and drawings complete, complete, unified, correct, clear, Fu Tai countries and industry standards; higher standardization, generalization, can guide the production and application. (2) by the Shandong Provincial Department of Machinery Industry foundry machinery product quality