Document Type and Number:
Japanese Patent JPS5684265
Kind Code:
U
Application Number:
JP16651179U
Publication Date:
July 07, 1981
Filing Date:
November 30, 1979
Export Citation:
International Classes:
H01J7/24; H01J23/00; H01J23/033; (IPC1-7): H01J23/033; H01J7/24