Document Type and Number:
Japanese Patent JPS5041202
Kind Code:
A
Application Number:
JP9362173A
Publication Date:
April 15, 1975
Filing Date:
August 21, 1973
Export Citation:
International Classes:
E01B9/28; E01B9/00; (IPC1-7): E01B9/00
Domestic Patent References:
| JPS4911770U | 1974-01-31 |