… open, and glass parts thereof, without fittings, for electric lamps and light sources, cathode-ray tubes or the …
Explanatory notes
… open, and glass parts thereof, without fittings, for electric lamps and light sources, cathode-ray tubes or the … coloured, opal, metallised, coated with fluorescent material, etc. Glass parts of envelopes (such as … silicate, cadmium borate, calcium tungstate). By means of a series of operations (including, insertion of filaments or …