Title:
【発明の名称】オーガの掘削制御方法
Document Type and Number:
Japanese Patent JP3012900
Kind Code:
B2
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Inventors:
Hajime Matsuzawa
Kaname Nakayama
Kaname Nakayama
Application Number:
JP15097796A
Publication Date:
February 28, 2000
Filing Date:
June 12, 1996
Export Citation:
Assignee:
Matsuzawa Motoko Co., Ltd.
Suntech Co., Ltd.
Suntech Co., Ltd.
International Classes:
E21B3/02; E21B7/00; E21B7/26; (IPC1-7): E21B3/02; E21B7/00; E21B7/26
Domestic Patent References:
| JP62242091A | ||||
| JP54118601A | ||||
| JP6216306B2 | ||||
| JP563597B2 |
Attorney, Agent or Firm:
Tsukasa Kubo