The estimating of statistical parameter, statistical test and classfication method about variety stability were introduced respectively.

介绍了品种稳定性评价的统计数估算 、 统计检验及品种稳定性分类的具体方法.

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This paper introduces the theory of the flocculant, its classfication, characteristics, application and development.

介绍了絮凝剂的絮凝原理 、 分类, 以及各类絮凝剂的特点和应用发展.

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