Document Type and Number:
Japanese Patent JPS5383138
Kind Code:
U
Application Number:
JP16692676U
Publication Date:
July 10, 1978
Filing Date:
December 13, 1976
Export Citation:
International Classes:
G03B17/20; G02B7/28; G02B7/30; (IPC1-7): G02B7/11; G03B17/20
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