Document Type and Number:
Japanese Patent JPS562722
Kind Code:
Y2
Application Number:
JP5203876U
Publication Date:
January 22, 1981
Filing Date:
April 27, 1976
Export Citation:
International Classes:
E01F8/00; E01B19/00; E01C1/00; E04B1/86; E04B1/94; E04B1/98; E04C2/26; G10K11/02; G10K11/16; (IPC1-7): E04B1/86; E01F8/00; E04B1/94; E04C2/26
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