Document Type and Number:
Japanese Patent JPS5046503
Kind Code:
A
Application Number:
JP9087073A
Publication Date:
April 25, 1975
Filing Date:
August 15, 1973
Export Citation:
International Classes:
E02F3/88; E02F3/92; E21C45/00; E21C45/04; E02F3/85; (IPC1-7): E21C45/00
Domestic Patent References:
| JP45007829A |