Title:
METHOD AND APPARATUS FOR OBSERVING BORING FOR
Document Type and Number:
Japanese Patent JPS59118986
Kind Code:
A
Inventors:
NAGAI TAKAO
YAMAMOTO TAKASHI
TSUCHIHIRO MICHIO
YAMAMOTO TAKASHI
TSUCHIHIRO MICHIO
Application Number:
JP22500182A
Publication Date:
July 09, 1984
Filing Date:
December 23, 1982
Export Citation:
Assignee:
KAJIMA CORP
International Classes:
E21B47/00; E21B49/00; (IPC1-7): E21B49/00
Attorney, Agent or Firm:
Kenji Wada