Document Type and Number:
Japanese Patent JPS5234210
Kind Code:
U
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Application Number:
JP12145775U
Publication Date:
March 10, 1977
Filing Date:
September 02, 1975
Export Citation:
International Classes:
G03B31/00; G11B23/04; G11B23/08; (IPC1-7): G03B31/00; G11B23/04