Title:
拡幅掘削方法
Document Type and Number:
Japanese Patent JP4619886
Kind Code:
B2
Inventors:
Yoichi Iguchi
Jun Sumizou
Mukai Katsumi
Jun Sumizou
Mukai Katsumi
Application Number:
JP2005216680A
Publication Date:
January 26, 2011
Filing Date:
July 27, 2005
Export Citation:
Assignee:
Marugo Foundation Industry Co., Ltd.
International Classes:
E21B11/00; E21B10/32
Domestic Patent References:
| JP2000160976A | ||||
| JP5321559A | ||||
| JP57155493A |
Attorney, Agent or Firm:
Osamu Mori