Title:
EMBEDDING OF HARMFUL SUBSTANCE IN SEA BOTTOM
Document Type and Number:
Japanese Patent JPS57172092
Kind Code:
A
Inventors:
TAKEUCHI MAKOTO
Application Number:
JP5742981A
Publication Date:
October 22, 1982
Filing Date:
April 15, 1981
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO
International Classes:
E21B7/132; B09B1/00; B09B3/00; E21B7/12; G21F9/30; G21F9/34; (IPC1-7): B09B3/00; E21B7/12; G21F9/30