Document Type and Number:
Japanese Patent JPS5092801
Kind Code:
A
Application Number:
JP14186873A
Publication Date:
July 24, 1975
Filing Date:
December 20, 1973
Export Citation:
International Classes:
E02F1/00; E21B1/00; E21B7/14; (IPC1-7): E21B1/00; E02F1/00