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Document Type and Number:
Japanese Patent JPH02109379
Kind Code:
U
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Application Number:
JP1855289U
Publication Date:
August 31, 1990
Filing Date:
February 20, 1989
Export Citation:
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International Classes:
G09B15/00; G10D7/10; G10D9/00; (IPC1-7): G09B15/00; G10D9/00



 
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