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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS6294197
Kind Code:
U
Application Number:
JP18486385U
Publication Date:
June 16, 1987
Filing Date:
November 30, 1985
Export Citation:
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International Classes:
E01C1/00; E21D9/14; (IPC1-7): E21D9/14; E01C1/00