Title:
【考案の名称】掘削装置
Document Type and Number:
Japanese Patent JP2511657
Kind Code:
Y2
Inventors:
Masato Ohori
Application Number:
JP3824490U
Publication Date:
September 25, 1996
Filing Date:
April 09, 1990
Export Citation:
Assignee:
Masato Ohori
International Classes:
E21B15/00; (IPC1-7): E21B15/00