Title:
METHOD AND DEVICE FOR DREDGING AND REJUVENATING DEEP WELL SUNK
Document Type and Number:
Japanese Patent JPS5549494
Kind Code:
A
More Like This:
| JPS60152736 | PUMPING-UP AND IRRIGATION WELL |
Inventors:
SUGAWARA JIYUNJI
Application Number:
JP12219078A
Publication Date:
April 09, 1980
Filing Date:
October 04, 1978
Export Citation:
Assignee:
SHOWA SAKUSEN KK
International Classes:
E03B3/15; E21B43/00; (IPC1-7): E03B3/15; E21B43/00
Domestic Patent References:
| JPS495975A | 1974-01-19 | |||
| JPS4838807A | 1973-06-07 |