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发明名称
摘要
申请公布号
BE736797(A)
申请公布日期
1969.12.31
申请号
BED736797
申请日期
1969.07.30
申请人
发明人
分类号
B21B31/04;B21B31/20;B21B31/32
主分类号
B21B31/04
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代理人
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地址
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