Title:
【発明の名称】掘削装置及びこれを用いた板材の打設方法
Document Type and Number:
Japanese Patent JP3329255
Kind Code:
B2
Inventors:
Takeshi Hayashi
Kazuyoshi Yoshida
Kazuhiro Takagi
Kazuyoshi Yoshida
Kazuhiro Takagi
Application Number:
JP1457598A
Publication Date:
September 30, 2002
Filing Date:
January 27, 1998
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
E21B3/02; E02D7/00; E21B7/20; E21B10/32; (IPC1-7): E21B10/32; E02D7/00; E21B3/02; E21B7/20
Domestic Patent References:
| JP8302679A | ||||
| JP59195926A | ||||
| JP6272815A | ||||
| JP813486A | ||||
| JP5894725U | ||||
| JP60139836U | ||||
| JP63116543U |
Attorney, Agent or Firm:
Masatake Shiga (6 people outside)
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