Document Type and Number:
Japanese Patent JPS5151794
Kind Code:
Y2
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Application Number:
JP11195572U
Publication Date:
December 11, 1976
Filing Date:
September 26, 1972
Export Citation:
International Classes:
E01D19/06; E01C11/02; E01C11/04; (IPC1-7): E01C11/02; E01D19/06