| 摘要 |
In the production of a photo-conductive cell (see Division H1), the rim of a metal structure is sealed to a glass envelope. The lead glass envelope and the iron-nickel-chromium cup-shaped body bearing the photo-conductive element are dehydrated in dry nitrogen, and still in dry nitrogen are placed in contact and held under pressure, the seal being formed by applying radio-frequency radiation to the area from an adjacent coil. During sealing, the device is cooled by blast of the dry nitrogen into the metal cup.
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