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Locomotion
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Non-Commercial Use
4
Category
Electricity and Magnetism
4
Maker
Cambridge Instrument Company Limited
4
Cambridge Scientific Instrument Company Limited
4
Object type
vacuo-junction
4
Date
From
To
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Vacuo-junction and holder (latest type)
1930
Vacuo-junction no.1656, rated at 2.5mA
Vacuo-junction by the Cambridge Instrument Co. Ltd.
1930
Vacuo-junction and holder (old type)
1930
