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SPRAYING EQUIPMENT, PARTS, AND ACCESSORIES THEREFOR-NAMELY, SPRAY GUNS; A SPRAY MATERIAL CIRCULATING UNIT COMPRISING A TANK, A PUMP, SPRAY GUN, PIPE LINES ASSOCIATED THEREWITH, AND REGULATORS, VALVES AND GAUGES THEREFOR; SPRAY MATERIAL CONTAINERS CONSTITUTING SPRAY GUN SUCTION FEED CUP ATTACHMENTS, PRESSURE FEED CUP ATTACHMENTS, AND PRESSURE FEED SUPPLY TANKS FOR CONNECTION BY HOSE TO SPRAY GUNS; LIQUID AGITATORS; LIQUID STRAINER ATTACHMENTS IN THE NATURE OF A SPRAY GUN ACCESSORY; PRESSURE REGULATORS DESIGNED TO CONTROL FLUID PRESSURE IN THE SPRAY GUNS; HOSE CLEANERS CONSTITUTING TANKS CONTAINING SOLVENT UNDER PRESSURE AND EQUIPPED WITH VALVES AND SHUT OFF HANDLES FOR THE DIRECTION OF THE SOLVENT THROUGH HOSE; [ CONNECTIONS COMPRISING A THREADED NUT AT ONE END FOR FASTENING TO A SPRAY GUN AND A RING FITTING ON THE OTHER END FOR ATTACHMENT TO A HOSE; AIR WASHING APPARATUS OF THE TYPE HAVING MEANS FOR INTRODUCING AND MIXING WATER INTO THE AIR, AN EXPANSION CHAMBER AND BAFFLES FOR SUBSEQUENTLY REMOVING THE WATER; AIR COMPRESSORS; LIQUID PUMPS OF THE CIRCULATING TYPE; AIR DUSTERS HAVING A HANDLE AND A FINGER OPERATED VALVE FOR DISCHARGING JETS OF AIR; FLOW GUNS; TURNTABLES AND CONVEYORS FOR SUPPORTING WITHIN SPRAY BOOTHS ARTICLES TO BE SPRAY COATED ]