分级产品 meaning in English

graded product

The experiments shows : ( 1 ) dispersing is a prerequisite to classification ; ( 2 ) designing a powerful and steady force field is the key to classification , and ( 3 ) the guarantee to classification is to let the product be in time gotten rid of
实验表明：分散是分级的前提；设计强有力的稳定力场是分级的关键；分级产品及时排除是分级的保障。基于此，本课题研究内容分为两部分。一、解决超微颗粒的分散问题。
The loss with time was put forward to value dispersion . the second part is about classifying the super - fine powder . due to the abrasive grain being hard , seriously wearing the equipment and requiring the narrow - grade , a new - type of vertical multistage waterpower system was developed
针对磨料硬度大对分级设备磨损严重、磨料微粉属于窄粒级分级产品而设计出一种新型垂直式多级水力分级系统，该系统主要特点： 1 、垂直式多级分级。