grain sizing machine

例句：

1. 1. The grainsizing machine is used to separate differenttypes of grains for quality control.
   粮食分级机用于分离不同种类的粮食，以进行质量控制。
2. 2. The grain sizingmachine has been upgraded to improve efficiencyand reduce labor costs.
   粮食分级机已经升级以提高效率并减少劳动力成本。
3. 3. The grainsizing machine is an essential toolfor farmers to ensure the quality of theircrops.
   粮食分级机是农民确保农作物质量的重要工具。