37 INSTALLATION, MAINTENANCE AND REPAIR OF PROPRIETARY MACHINERY AND EQUIPMENT, NAMELY, WASHING, RINSING AND DRYING APPARATUS, NAMELY, MACHINES FOR WASHING GLASSWARE, ANIMAL CAGES, CAGE RACKS, AND MEDICAL INSTRUMENTS USED IN HOSPITALS, MEDICAL LABORATORIES, MEDICAL RESEARCH FACILITIES, AND MEDICAL/CLINIC INSTITUTIONS; BOTTLE FILLING MACHINES AND RELATED STRUCTURAL PARTS USED IN HOSPITALS, MEDICAL LABORATORIES, MEDICAL RESEARCH FACILITIES AND MEDICAL/CLINICAL INSTITUTIONS; NECROPSY TABLES AND RELATED STRUCTURAL PARTS USED IN HOSPITALS, MEDICAL LABORATORIES, MEDICAL RESEARCH FACILITIES AND MEDICAL/CLINICAL INSTITUTIONS; REFRIGERATED SANDWICH AND SALAD PREPARATION TABLES; ELECTRIC BUN WARMING DRAWER-STYLE CABINET; REFRIGERATED REACH-IN FOOD MERCHANDISING CABINET; ELECTRICALLY HEATED FOOD TABLE; REFRIGERATED EQUIPMENT STAND; COMMERCIAL KITCHEN VENTILATION CANOPY