Document Type and Number:
Japanese Patent JPS4817957
Kind Code:
B1
Application Number:
JP3195769A
Publication Date:
June 01, 1973
Filing Date:
April 23, 1969
Export Citation:
International Classes:
B21C37/15; B21D31/00; B21D53/00; F15C5/00; (IPC1-7): F15C5/00
Domestic Patent References:
| JP41010450A |