Title:
【発明の名称】岩盤にスロットを形成するための削孔装置
Document Type and Number:
Japanese Patent JP2761954
Kind Code:
B2
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Inventors:
INOE HIROYUKI
SASAKI MASAJI
SASAKI MASAJI
Application Number:
JP34307389A
Publication Date:
June 04, 1998
Filing Date:
December 28, 1989
Export Citation:
Assignee:
MAEDA KENSETSU KOGYO KK
International Classes:
E21B7/18; E21B19/24; E21C25/60; E21D9/00; (IPC1-7): E21C9/00
Domestic Patent References:
| JP288881A | ||||
| JP129596A | ||||
| JP6343273Y2 |
Attorney, Agent or Firm:
Fujii Minoru