Title:
COMPENSATION OF DIRECTION OF PIERCING BORING
Document Type and Number:
Japanese Patent JPS5820893
Kind Code:
A
Inventors:
MATSUOKA TAKESHI
Application Number:
JP11844581A
Publication Date:
February 07, 1983
Filing Date:
July 30, 1981
Export Citation:
Assignee:
USHIO KOGYO CO
OOMAE MOTOO
OOMAE MOTOO
International Classes:
E21B7/10; E21B7/06; (IPC1-7): E21B7/06
Attorney, Agent or Firm:
Sakuo Yamaguchi