Explanatory notes
… TUBES OR VALVES OR FLASHBULBS, IN GLASS ENVELOPES This group includes : (A) Machines for the vacuum‑sealing of … components of lamps or valves (e.g., machines for cutting out or deep drawing screens, anodes or supports ( … by casting, drawing, rolling, spinning, blowing, modelling, moulding, etc. Machines for working glass in the hard state …