Document Type and Number:
Japanese Patent JPS5217471
Kind Code:
Y2
Application Number:
JP4756872U
Publication Date:
April 20, 1977
Filing Date:
April 24, 1972
Export Citation:
International Classes:
B21D7/16; B21D7/00; B21D7/025; H05B6/10; (IPC1-7): B21D7/025; B21D7/16