Document Type and Number:
Japanese Patent JPS6256625
Kind Code:
B2
Inventors:
SAKAI HIDEYUKI
Application Number:
JP7125879A
Publication Date:
November 26, 1987
Filing Date:
June 08, 1979
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H01J31/28; H01J29/54; H01J29/76
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