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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH0218921
Kind Code:
B2
Application Number:
JP18364081A
Publication Date:
April 27, 1990
Filing Date:
November 18, 1981
Export Citation:
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Assignee:
NIPPON STEEL CORP
International Classes:
B21B19/02; B21B19/06; B21B23/00