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X—3ZZ318三工位多触头高压造型线的砂箱尺寸是800×600×250/250毫米,生产率为120～180型/时,它是为了适应当时地方骨干拖拉机厂扩建需要设计的。电控部分由一机部第四设计院设计电气系统,苏州无线电厂设计晶体管逻辑单元,并制造全套电控设备。1976年6月全线调试结束后,电控设备又根据运行及制造情况作了改进设计,定名为DZK～20型电子自动控制设备,并于1978年5月一机部对该造型线组织鉴定后,定为国家标准产品。
X-3ZZ318 three-station multi-touch high-pressure molding line box size is 800 × 600 × 250/250 mm, the productivity of 120 to 180 type / hour, it is to adapt to the local backbone tractor plant expansion needs to be designed. The electric control part is designed by the fourth design institute of a machine department and the electrical system is designed by Suzhou Radio Factory. The complete set of electronic control equipment is also manufactured. After the commissioning of the whole line in June, 1976, the electronic control equipment was further improved and designed according to the operation and manufacturing conditions. It was named as DZK ~ 20 type electronic automatic control equipment. After a machine department identified the shape line in May 1978 , As a national standard product.