Title:
掘削方法及び装置
Document Type and Number:
Japanese Patent JP4453883
Kind Code:
B2
Inventors:
Mitsuhiro Shibasaki
Application Number:
JP28108399A
Publication Date:
April 21, 2010
Filing Date:
October 01, 1999
Export Citation:
Assignee:
Chemical Grout Co., Ltd.
International Classes:
E21B3/00; E21B10/00; E21D9/10
Domestic Patent References:
| JP53028001A | ||||
| JP7109891A |
Attorney, Agent or Firm:
Toshitada Takahashi
Toshikuni Takahashi
Toshikuni Takahashi