Explanatory notes
… materials. But the heading excludes calutrons for isotopic separation ( heading 84.01 ). (7) Colorimeters . The term … (e.g., carbon monoxide and hydrogen in flue gases). (iii) Selective absorption of ultra‑violet, visible, infra‑red or … preparation device, an analysing unit with, e.g., ion‑sensitive electrodes, photometers or polarographs and, in …