| 90 | Optical instruments and apparatus, photographic, cinematographic, measuring, checking, precision, medical or surgical; parts and accessories |
| 9017 | Charting tools, marking-out or mathematical calculating instruments (for example, drafting machines, pantographs, protractors, drawing sets, slide rules, disc calculators); hand tools, for linear measurements (eg measuring |
| 901790 | Parts and accessories of instruments drawing, marking-out or mathematical calculating,); hand tools, for measuring length, elsewhere in this group does not naming |
| 9017900001 | Part plotters subheading 9017 10 100 0 9017 20050 0 |