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Document Type and Number:
Japanese Patent JPS5640149
Kind Code:
Y2
Application Number:
JP17072677U
Publication Date:
September 18, 1981
Filing Date:
December 20, 1977
Export Citation:
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International Classes:
H01J9/233; H01J40/12; H01J43/00; (IPC1-7): H01J43/00; H01J9/233



 
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