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 20 Other breathing appliances and gas masks, excl. protective masks.... 90 20 00 Scuba equipment Commodity Code Description 90 20 00 10 Scuba equipment 90 20 00 90 Other breathing appliances and gas masks, excl protective masks having neither mech.. pa
