我厂革命职工在厂党委的领导下,深入开展批林批孔运动,发扬了自力更生的革命精神,在铸造型砂处理系统成功地采用了“螺旋振动垂直提升机”,经一段时间的生产试验,提升旧砂均匀稳定,取得较好效果。现将设计、制造、调试、改进实践中的初步认识介绍如下; Under the leadership of the factory party committees, the revolutionary workers of our factory successfully carried out the campaign of “criticizing the bore holes and approving holes” and carried forward the revolutionary spirit of self-reliance. Successfully adopted the “spiral vibration vertical elevator” in the foundry sand processing system. After a period of production tests, Improve the uniform and stable old sand, get better results. Now the design, manufacture, commissioning, improve the initial understanding of the practice described below;