Document Type and Number:
Japanese Patent JPS52136430
Kind Code:
U
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Application Number:
JP4589576U
Publication Date:
October 17, 1977
Filing Date:
April 12, 1976
Export Citation:
International Classes:
E01C11/22; E01C3/00; E04C2/04; (IPC1-7): E01C3/00; E04C2/04