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 22 USES, INCLUDING RADIOGRAPHY OR RADIOTHERAPHY APPARATUS, X-RAY TUBES AND 90 22 21 APP. USING ALPHA,BETA,GAMMA RADIATIONS FOR MED./SURGICAL/DENTAL/VET. USES Commodity Code Description 90 22 21 00 APP. USING ALPHA,BETA,GAMMA RADIATIONS FOR MED./SURGICAL/DENTAL/VET. USES