Document Type and Number:
Japanese Patent JPS643164
Kind Code:
Y2
Application Number:
JP16755879U
Publication Date:
January 26, 1989
Filing Date:
December 05, 1979
Export Citation:
International Classes:
H01J31/20; H01J7/18; H01J29/02; H01J29/94; (IPC1-7): H01J29/94; H01J7/18; H01J29/02
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