… Glass envelopes (including bulbs and tubes), 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 … radio valves, cathode-ray tubes, rectifier valves or other electronic tubes or valves, infra-red lamps, etc.). Most of … series of operations (including, insertion of filaments or electrodes, exhaustion of the envelope, introduction of one …