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Document Type and Number:
Japanese Patent JPS5540920
Kind Code:
B2
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Application Number:
JP13270877A
Publication Date:
October 21, 1980
Filing Date:
November 04, 1977
Export Citation:
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International Classes:
G08B17/00; G01H1/00; G08B19/00; G08B27/00; H04H20/00; H04H20/59



 
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