Document Type and Number:
Japanese Patent JPS57182726
Kind Code:
U
Application Number:
JP6991481U
Publication Date:
November 19, 1982
Filing Date:
May 16, 1981
Export Citation:
International Classes:
G03B13/26; G02B5/04; G03B13/02; G03B19/12; (IPC1-7): G03B13/02; G02B5/04; G03B19/12
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