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Document Type and Number:
Japanese Patent JPS5172190
Kind Code:
A
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Inventors:
NAITO YUTAKA
Application Number:
JP14558074A
Publication Date:
June 22, 1976
Filing Date:
December 20, 1974
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H01J9/32; H01J9/02; (IPC1-7): H01J9/02



 
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