振动筛目数的定义 
    所谓目数，是指物料的粒度或粗细度，一般定义是指在1英寸（inch）*1英寸（inch）的面积内有多少个网孔数，即筛网的网孔数，物料能通过该网孔即定义为多少目数：如200目,就是该物料能通过1inch*1inch内有200个网孔的筛网。以此类推，目数越大，说明物料粒度越细，目数越小，说明物料粒度越大。通常所说的目数在振动筛机上就是指的筛网目数亦可指筛分物料的目数。
    The so-called mesh refers to the size or thickness of materials, the general is defined in the 1-inch (inch) * 1 inch (inch) area of the number of mesh, which is several mesh sieve, the material can through the mesh that is defined as the number of mesh: 200 mesh, such as that of the material through 1inch * 1inch with 200 mesh screen. And so on, the greater the number of heads on the finer particle size material, the smaller the mesh on the larger particle size materials. Usually referred to in the vibrating screen mesh machine refers to the screen mesh material may also refer to the mesh screen.