Section 18 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION , MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; M USICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 Optical, photographic, cinematographic measuring, checking, precision, medical o 90 15 - Surveying (including photogrammetrical surveying), hydrographic, oceanographic 90 15 10 90 15 10 00 Commodity Code Description 90 15 10 00 00 - Rangefinders 90 15 20 00 00 - Theodolites and tachymeters (tacheometers) 90 15 30 00 00 - Levels 90 15 40 00 00 - Photogrammetrical surveying instruments and appliances 90 15 80 00 00 - Other instruments and appliances 90 15 90 00 00 - Parts and accessories