Document Type and Number:
Japanese Patent JPS56120660
Kind Code:
U
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Application Number:
JP1796680U
Publication Date:
September 14, 1981
Filing Date:
February 15, 1980
Export Citation:
International Classes:
H01J37/141; H01J7/24; H01J37/10; H01J37/15; H01J37/24; (IPC1-7): H01J37/10; H01J7/24; H01J37/24