… Drawing, marking-out or mathematical calculating instruments (for example, drafting machines, pantographs, protractors, drawing sets, slide rules, disc …
Explanatory notes
… substrates (such as optical, E-beam, focused ion beam, X-ray or laser beam apparatus) ( heading 84.86 ). (d) … a measuring rod, amplifying dial and transmission system (rack, gear, lever, spring, pneumatic, hydraulic, etc.). (5) … designed for surveying (land chains, levelling staves, ranging poles, etc.) and winch‑type measures for mine shafts …