The structure of probability screen vibration frame change unitary welded type to bolt fastening. This way USES handy and effect is well.
将概率分级筛激振器机架的结构由整体焊接式改为螺栓联接式，使用方便，效果很好。
Shui nationality culture there exists distribution in information resources scatteredly, collect incompletely, collect quantity is few, the type is unitary wait for a problem.
水族文化信息资源存在分布零散、收集不全，收藏数量少、类型单一等问题。
This text that make use of the order of matrix gives outs the unitary polynomials divide exactly theorem of judgment; And give a simple and convenient method about quotients type at the same time.
利用矩阵的秩给出一元多项式整除性的判定定理，同时给出商式的简便求法。
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