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Document Type and Number:
Japanese Patent JPS646968
Kind Code:
Y2
Application Number:
JP5478483U
Publication Date:
February 23, 1989
Filing Date:
April 14, 1983
Export Citation:
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International Classes:
B21C23/21; B21C25/02; B21C25/04; (IPC1-7): B21C25/02



 
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