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, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof 90 22 APPARATUS BASED ON THE USE OF XRAYS OR OF ALPHA, BETA , GAMMA OR OTHER IONISING RADIA 90 22 19 For other uses 90 22 19 00 For other uses Commodity Code Description 90 22 19 00 000 For other uses