Title:
ロータリーテーブルマシン用二重管掘削装置
Document Type and Number:
Japanese Patent JP4121715
Kind Code:
B2
Inventors:
Kazunori Furuki
Koji Otake
Koji Otake
Application Number:
JP2001056760A
Publication Date:
July 23, 2008
Filing Date:
March 01, 2001
Export Citation:
Assignee:
Daichi Co., Ltd.
Mining Industry Co., Ltd.
Mining Industry Co., Ltd.
International Classes:
E21B3/04; E21B10/32; E21B17/00; E21B17/07
Domestic Patent References:
| JP8144671A | ||||
| JP3125784A | ||||
| JP3090790A |
Attorney, Agent or Firm:
Hirotaka Hatayama