Explanatory notes
… other technical uses, of heading 69.09; (d) Glass mirrors, not optically worked, of heading 70.09, or mirrors … used in astronomy, photography, cinematography or for microscopic observation. (B) Instruments and apparatus … in certain headings, for example, compound optical microscopes (heading 90.11), electron microscopes …Legal note
… (for example, maternity belts, thoracic support bandages, abdominal support bandages, supports for joints or muscles) … (c) Refractory goods of heading 69.03; ceramic wares for laboratory, chemical or other technical uses, of heading 69.09; (d) Glass mirrors, not optically worked, of heading 70.09, or mirrors …