Document Type and Number:
Japanese Patent JPS6213702
Kind Code:
Y2
Application Number:
JP11228278U
Publication Date:
April 08, 1987
Filing Date:
August 16, 1978
Export Citation:
International Classes:
B21D28/32; B21D28/02; B21D28/14; B23D31/00; B23D31/04; (IPC1-7): B21D28/02; B23D31/04