7 CENTRAL LUBRICATING SYSTEMS HAVING THE ESSENTIAL COMPONENTS OF ELECTRI CALLY, HYDRAULICALLY & PNEUMATICALLY OPERATED LUBRICATING PUMPS, BARRE L PUMPS, MECHANICALLY, HYDRAULICALLY AND ELECTRICALLY CONTROLLED RE- VERSE VALVES, LUBRICANT SPREADERS AND VALVES; LUBRICATING DEVICES INCL UDING ELECTRICALLY AND AIR-OPERATED GREASE ANDOILS GUNS, LAUBRICATING DEVICES AND LUBRICATING MACHINES; PUMPS AND DEVICES FOR FEEDING LIQ- UID & HIGHLY VISCOUS AGENTS, INCLUSIVE OF BARREL PUMPS, SPRAYGUNS FOR SPRAYING OF PAINTS AND VARNISHES, PNEUMATIC & ELECTRICAL PUMPS & VALV ES; WORKSHOP AND SERVICE STATION EQUIPMENT INCLUDING THE FOLLOWING ES- SENTIAL COMPONENTS: HOSE WINDERS, LUBRICATING EQUIPMENT FOR MOTOR CAR SERVICING, LIFTING PLATFORMS, BATCHER GUNS; EQUIPMENT FOR COMPRESSED AIR SYSTEMS INCLUDING THE FOLLOWING ESSENTIAL COMPONENTS: COMPRESSORS , WATER SEPARATORS, PRESSURE REGULATORS, OIL SPRAYING DEVICES, MIST OI LERS AND VALVES; BATCHERS FOR OILS AND GREASES AND ALL LIQUID & HIGHLY VISCOUS AGENTS; LUBRICATING NIPPLES; ELECTRIC AND ELECTRONIC PROGRAM CONTROLLING & MONITORING DEVICES FOR CENTRAL LUBRICATING SYSTEMS AND L UBRICANT SUPPLY ARRANGEMENTS