Title:
HYDRAULIC CIRCUIT FOR HYDRAULIC TYPE ROCK DRILL
Document Type and Number:
Japanese Patent JPS61109895
Kind Code:
A
Inventors:
MITSUO KOJI
Application Number:
JP23139284A
Publication Date:
May 28, 1986
Filing Date:
November 05, 1984
Export Citation:
Assignee:
MITSUO SOHGOH KENKYUSHO KK
International Classes:
E21B1/26; E21B1/00; (IPC1-7): E21C3/20