Document Type and Number:
Japanese Patent JPS6243035
Kind Code:
B2
Inventors:
OOSHIKA HARUO
SHINJO JUN
SHINJO JUN
Application Number:
JP1403379A
Publication Date:
September 11, 1987
Filing Date:
February 09, 1979
Export Citation:
Assignee:
KOKEN BORING MACHINE CO
International Classes:
E21B3/02; E21B3/00