Document Type and Number:
Japanese Patent JPS4873903
Kind Code:
U
Application Number:
JP11712271U
Publication Date:
September 14, 1973
Filing Date:
December 14, 1971
Export Citation:
International Classes:
E02F5/30; E01C23/12; E02F3/64; E21D9/10; (IPC1-7): E01C23/12; E02F3/64; E21D9/10