rotary drum grader

例句：

1. 1. The rotary drum grading machine is used to separate the different sizes of materials.
   旋转滚筒式分级机用于分离不同大小的物料。
2. 2.This rotary drum grading machine has been proven to be highly efficient in material processing.
   这种旋转滚筒式分级机在材料加工中已被证明是非常高效的。
3. 3.The rotary drum grading machine is widely used in industries such as mining, metallurgy, and construction.
   旋转滚筒式分级机广泛应用于矿业、冶金和建筑等行业。