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 28 Gas, liquid or electricity supply or production meters.... 90 28 20 Liquid meters Commodity Code Description 90 28 20 00 Liquid meters
