Document Type and Number:
Japanese Patent JPH0138849
Kind Code:
Y2
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Application Number:
JP5354680U
Publication Date:
November 20, 1989
Filing Date:
April 18, 1980
Export Citation:
International Classes:
H01J61/30; H01J5/38; H01J7/22; H01J9/385; (IPC1-7): H01J7/22; H01J5/38; H01J9/385
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