Roller assembly for cleaning equipment and cleaning equipment - YAN GUIXIANG; WANG CONGYING (2025)
Keywords: AXLES FOR WHEELS OR CASTORS; CASTORS; COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; DOMESTIC WASHING OR CLEANING; FURNITURE; HUMAN NECESSITIES; INCREASING WHEEL ADHESION; PERFORMING OPERATIONS; SPICE MILLS; SUCTION CLEANERS IN GENERAL; TRANSPORTING; VEHICLE WHEELS; VEHICLES IN GENERAL