… Glass envelopes (including bulbs and tubes), open, and glass parts thereof, without fittings, for electric lamps and …
Explanatory notes
… envelopes (including bulbs and tubes), open, and glass parts thereof, without fittings, for electric lamps and … electric lamps and light sources , or bent into shape for advertising signs. (C) Tubes lined with a fluorescent … tungstate). By means of a series of operations (including, insertion of filaments or electrodes, exhaustion of the …