Document Type and Number:
Japanese Patent JPS5220157
Kind Code:
U
Application Number:
JP10448875U
Publication Date:
February 14, 1977
Filing Date:
July 30, 1975
Export Citation:
International Classes:
H01J7/24; H01J23/033; H01J25/00; (IPC1-7): H01J7/24; H01J25/00