Sludge filters, namely, filter for sludge dewatering machines; [ Sand filters for machines in industrial or civil waste water treatment applications; Filtering machines for waste water processing in the nature of sorting solids from liquid matter; ] Screening machines for waste water processing in the nature of sorting solid matter from waste matter; Filters and filtering screens as parts of waste water separator machines; [ effluent and slurry or waste water filtering machines parts, namely,...