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PCE
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CPC Subgroup
H01J 3/06

two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes (H01J3/07 takes precedence)

Full Title

Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes (H01J3/07 takes precedence)