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 31 Measuring or checking instruments, appliances and machines, nes Commodity Code Description 90 31 10 Machines for balancing mechanical parts 90 31 20 Test benches 90 31 41 For inspecting semiconducter wafers or devices or for inspecting photomasks or reticles 90 31 49 Other optical instruments and appliances 90 31 80 Other instruments, appliances and machines 90 31 90 Parts and accessories of measuring/checking instruments, appliances and machines
