Title:
【発明の名称】地盤掘孔装置
Document Type and Number:
Japanese Patent JPH0768838
Kind Code:
B2
Inventors:
Teruo Oi
Application Number:
JP12011089A
Publication Date:
July 26, 1995
Filing Date:
May 12, 1989
Export Citation:
Assignee:
Geo Top Co., Ltd.
International Classes:
E21B10/44; E21B3/02; E21B7/00; E21B17/22; (IPC1-7): E21B10/44; E21B3/02; E21B7/00; E21B17/22
Attorney, Agent or Firm:
Hiromichi Kuroda (3 outside)
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