A bag filter for dust abatement at the discharge point should be provided. 在卸料地点应该装设袋滤器以消除粉尘。
This easy-to-handle digital SLR camera uses an exclusive vibrating filter to eliminate dust and produce spotless pictures no matter where you change lenses. 这易于处理的数码单反相机使用的专用振动过滤器，以消除粉尘和生产一尘不染图片无论您身在何处改变镜头。
