And by installing a dynamic imitation screen, adopting the communication module, the automatic lev-el of donkey engine system is improved.

该设计系统设立动态模拟屏，采用计算机通讯模块，集散控制，提高了辅机系统自动化水平。

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This paper puts forward coactions way of imitation screen and matter, it conforms to movement process, may use computer demonstrating, it has significance to practice parameter design.

对比提出模拟筛条和物料相互作用方式的方法，比较符合实际的运动过程，可用于计算机演示，对实际的参数设计有一定的意义。

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Assembly screen is the imitation of the original screen, both inside and outside the screen are not original, poor quality.

组装屏幕就是仿原装屏，内外屏均不是原装，质量差。

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