Document Type and Number:
Japanese Patent JPS5214223
Kind Code:
B2
Application Number:
JP8390471A
Publication Date:
April 20, 1977
Filing Date:
October 25, 1971
Export Citation:
International Classes:
B21D22/18; B21D22/00; B21D22/06; B21D37/00; (IPC1-7): B21D22/00; B21D37/00
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