This paper analyzed the structure and the working process of three-layer-cylindrical grader and the grading performance and screen mesh-size are experimentally studied.

分析了三层滚筒式银杏分级机的结构特点及工作过程，并对分级机的分级性能及筛孔大小进行了试验研究。

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The screen grading tests for determining the rational amount of starch to be added and the tests for observing the effect of the ingredient of starch and other additives are conducted.

为了改善方便面的品质，进行了添加淀粉的筛选试验和淀粉与其他添加剂的配合实验。

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Electromagnetic high frequency vibrating screen is used for grading and dehydrating fine particles in both dry method and wet method.

脉冲高频筛是筛面高频振动的振网式筛分机械，适用于细粒分体物料的干、湿法分级、脱水。

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Teachers can even save the content of the screen for later grading or distribution.

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