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DK46243D1930-10-131931-09-25Luftfyldt Udladningsror med Glødekatode, fortrinsvis Oksydkatode, og een eller flere i Rørarme anbragte Anoder.
DK46243C
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Improvements in or relating togas filled discharge tubes comprising an incandescent cathode, preferably an oxide cathode and one or more anodes mounted in arms
Procedimiento y dispositivo para la condensación y extracción simultánea de agua de pasta de amianto, cemento o semejante, todavía blanda, con contenido de agua, en la fabricación de tubos.