Title:
METHOD OF ACCURATELY LAYING PILOT HOLE IN GROUND
Document Type and Number:
Japanese Patent JPS53142901
Kind Code:
A
Inventors:
KITAMURA KOUICHI
HAYASHI HIROTAKA
HAYASHI HIROTAKA
Application Number:
JP5910477A
Publication Date:
December 13, 1978
Filing Date:
May 20, 1977
Export Citation:
Assignee:
KIDO KENSETSU KOGYO
International Classes:
E21B7/04; E21B7/00; (IPC1-7): E21B7/00