20 MOBILE, MOVABLE AND SELF-STANDING WORKSTATION FRAMES AND EQUIPMENT CARRIERS FOR PERSONAL COMPUTERS, PRINTERS, DIAGNOSTIC AND ELECTRICAL EQUIPMENT, MEASURING EQUIPMENT, SCIENTIFIC ANALYSIS EQUIPMENT, AND LABORATORY EQUIPMENT; MOBILE, MOVABLE AND SELF-STANDING WORKSTATION AND FURNITURE FRAMES FOR DRAWERS, CARTS, FLIP-CHARTS, MAGNETIC WALLS, PIN-UP WALLS, PROJECTION WALLS, SPEAKERS' ROSTRUMS, BULLETIN BOARDS, FILING CABINETS, DISPLAY PROSPECTUSES, HANGING FILES, DISPLAY CASES FOR MEDICINES, TOOLS, SPARE PARTS, CLEANING EQUIPMENT AND MEDICAL, SCIENTIFIC, AND MEASURING INSTRUMENTS, AND SHOWCASES FOR MUSEUMS