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发明名称
摘要
申请公布号
BE714554(A)
申请公布日期
1968.11.04
申请号
BED714554
申请日期
1968.05.02
申请人
发明人
分类号
B21D7/024;B21D11/07
主分类号
B21D7/024
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代理人
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地址
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