… Drawing, marking-out or mathematical calculating instruments (for example, drafting …
Explanatory notes
… 90.17 ‑ Drawing, marking‑out or mathematical calculating instruments (for example, drafting … in navigation. (2) Drafting machines generally using a system of parallelograms, with or without drawing boards or … day, aperture setting, type of subject and sensitivity of emulsion. Calculating or accounting machines, however, are …