Title:
AIR SWIVEL FOR METHOD OF EARTH AUGER PROPULSION CONSTRUCTION
Document Type and Number:
Japanese Patent JPS62133286
Kind Code:
A
Inventors:
TAKASU MOTOYUKI
HARA KOICHI
FUKUDA SUMIO
HARA KOICHI
FUKUDA SUMIO
Application Number:
JP27077685A
Publication Date:
June 16, 1987
Filing Date:
December 03, 1985
Export Citation:
Assignee:
TOKYU KENSETSU KK
International Classes:
E21D9/08; E21B4/14; E21B17/05; E21B17/22; (IPC1-7): E21B17/05; E21D9/08
Attorney, Agent or Firm:
Sakuo Yamaguchi