Document Type and Number:
Japanese Patent JPS5247843
Kind Code:
Y2
Application Number:
JP575272U
Publication Date:
October 31, 1977
Filing Date:
January 08, 1972
Export Citation:
International Classes:
E02D5/66; E02F3/06; E02F5/20; E21B1/00; (IPC1-7): E02D5/66; E02D17/142; E02F5/20