Document Type and Number:
Japanese Patent JPS5544202
Kind Code:
B2
Application Number:
JP175873A
Publication Date:
November 11, 1980
Filing Date:
December 30, 1972
Export Citation:
International Classes:
E02D31/14; E01C3/00; E01C3/06; E01C11/24; (IPC1-7): E01C3/00; E01C11/24