Document Type and Number:
Japanese Patent JPS5116681
Kind Code:
B1
Application Number:
JP128170A
Publication Date:
May 26, 1976
Filing Date:
December 25, 1969
Export Citation:
International Classes:
E02D17/13; E02D17/00; E02F5/02; E02F5/20; E21B1/04; E21B7/18; (IPC1-7): E02F5/20; E02D17/00