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 25 Hydrometers and similar floating instruments, thermometers, pyrometers, baromete 90 25 80 Commodity Code Description 90 25 80 00 90 25 80 10 Barometers, not combine with other instruments 90 25 80 90 Other