90: Optical, photo, technical, medical, etc apparatus

9001: Optical fibres, lenses, mirrors, prisms, etc 9002: Mounted lenses, prisms, mirrors, optical elements nes 9003: Frames and mountings for spectacles, goggles, etc 9004: Spectacles, goggles etc., corrective or protective 9005: Binoculars, monoculars, telescopes, etc 9006: Photographic cameras (except cine), accessories 9007: Cinematographic cameras and projectors 9008: Image projectors, photographic enlargers and reducers 9009: Photo-copying apparatus 9010: Equipment for photographic laboratories nes 9011: Compound optical microscopes 9012: Microscopes except optical, diffraction apparatus 9013: Liquid crystal devices, lasers, optical appliances ne 9014: Navigational instruments, direction finding compasses 9015: Survey, oceanographic, meteorological instruments etc 9016: Balances of a sensitivity of 50 milligram or better 9017: Drawing, mathematical, length measuring instruments 9018: Instruments etc for medical, surgical, dental, etc us 9019: Therapeutic appliances, nes 9020: Breathing appliances and gas masks 9021: Orthopaedic appliances 9022: Equipment using X-rays, alpha, beta, gamma rays 9023: Instruments, apparatus and models, for demonstration 9024: Machines for testing mechanical properties of materia 9025: Hydrometers, thermometers, barometers, etc 9026: Equipment to measure fluid flow, level, pressure, etc 9027: Equipment for physical and chemical analysis 9028: Gas, liquid or electricity supply or production meter 9029: Revolution counters, taximeters, speedometers, etc 9030: Instruments to check or measure electricity, radiatio 9031: Measuring or checking instruments nes 9032: Automatic regulating or controlling equipment 9033: Parts, accessories nes for opto-electric instruments 90: Optical, photo, technical, medical, etc apparatus