Document Type and Number:
Japanese Patent JPS5212147
Kind Code:
B2
Application Number:
JP1176475A
Publication Date:
April 05, 1977
Filing Date:
January 27, 1975
Export Citation:
International Classes:
B21C37/20; B21D31/00; B21H1/18; B21H3/00; B23P9/02; B24B39/02