Document Type and Number:
Japanese Patent JPS5682020
Kind Code:
U
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Application Number:
JP16260979U
Publication Date:
July 02, 1981
Filing Date:
November 26, 1979
Export Citation:
International Classes:
E01F13/00; E01F9/00; E01F9/615; E01F9/631; E01F9/646; E01F9/65; E01F9/677; (IPC1-7): E01F13/00