Document Type and Number:
Japanese Patent JPS6242090
Kind Code:
B2
Inventors:
NAKAKAWANISHI TADASHI
Application Number:
JP8030083A
Publication Date:
September 07, 1987
Filing Date:
May 09, 1983
Export Citation:
Assignee:
NAKAKAWANISHI TADASHI
International Classes:
E02D17/13; E02F5/02; E21B3/025; E21B7/02