Section 18 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 OPTICAL, PHOTOGRAGHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 27 MEASURING OR CHECKING QUANTITIES OF HEAT, SOUND OR LIGHT (INCLUDING Commodity Code Description 90 27 10 GAS OR SMOKE ANALYSIS APPARATUS 90 27 20 CHROMATOGRAPHS AND ELECTROPHORESIS INSTRUMENTS 90 27 30 SPECTROMETERS, SPECTROPHOTOMETERS & SPECTROGRAPHS USING OPTICAL RADIATIONS 90 27 50 OTHER INSTRUMENTS AND APPARATUS USING OPTICAL RADIATION (UV, VISIBLE,IR) 90 27 81 MASS SPECTROMETERS 90 27 89 OTHER 90 27 90 MICROTOMES, PARTS AND ACCESSORIES
