Document Type and Number:
Japanese Patent JPS5625483
Kind Code:
Y2
Application Number:
JP17020575U
Publication Date:
June 16, 1981
Filing Date:
December 16, 1975
Export Citation:
International Classes:
H01J7/24; H01J23/00; H01J23/033; H01J25/50; (IPC1-7): H01J23/033; H01J7/24