Title:
【発明の名称】掘削装置
Document Type and Number:
Japanese Patent JPH0749753
Kind Code:
B2
Inventors:
Masato Ohori
Application Number:
JP11907090A
Publication Date:
May 31, 1995
Filing Date:
May 08, 1990
Export Citation:
Assignee:
Masato Ohori
International Classes:
E21B15/00; E21D7/00; (IPC1-7): E21B15/00
Domestic Patent References:
| JP1102283U | ||||
| JP49111105U |
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