Document Type and Number:
Japanese Patent JPS5638871
Kind Code:
B2
Application Number:
JP5657273A
Publication Date:
September 09, 1981
Filing Date:
May 19, 1973
Export Citation:
International Classes:
C21D1/00; C21D1/52; F27B9/00; F27B9/12; F27D13/00; F27D17/00