Document Type and Number:
Japanese Patent JPS5680933
Kind Code:
U
Application Number:
JP16107779U
Publication Date:
June 30, 1981
Filing Date:
November 22, 1979
Export Citation:
International Classes:
B21J1/06; B21J3/00; B21J13/02; (IPC1-7): B21J3/00; B21J1/06; B21J13/02