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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH0220250
Kind Code:
Y2
Application Number:
JP2165084U
Publication Date:
June 04, 1990
Filing Date:
February 20, 1984
Export Citation:
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International Classes:
E01D11/00; B25B25/00; E01D4/00; E01D11/02; E01D11/04; E01D19/16; (IPC1-7): E01D11/00