Title:
【考案の名称】掘削装置
Document Type and Number:
Japanese Patent JP2511669
Kind Code:
Y2
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Inventors:
Masato Ohori
Application Number:
JP6023590U
Publication Date:
September 25, 1996
Filing Date:
June 06, 1990
Export Citation:
Assignee:
Masato Ohori
International Classes:
E21B15/00; E02D17/13; E02F5/02; (IPC1-7): E21B15/00